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diff --git a/xpcom/build/nsXULAppAPI.h b/xpcom/build/nsXULAppAPI.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _nsXULAppAPI_h__
+#define _nsXULAppAPI_h__
+
+#include "js/TypeDecls.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/ProcessType.h"
+#include "mozilla/TimeStamp.h"
+#include "nscore.h"
+
+#if defined(MOZ_WIDGET_ANDROID)
+#  include <jni.h>
+#endif
+
+class JSString;
+class MessageLoop;
+class nsIDirectoryServiceProvider;
+class nsIFile;
+class nsISupports;
+struct JSContext;
+struct XREChildData;
+struct XREShellData;
+
+namespace mozilla {
+class XREAppData;
+struct BootstrapConfig;
+}  // namespace mozilla
+
+/**
+ * A directory service key which provides the platform-correct "application
+ * data" directory as follows, where $name and $vendor are as defined above and
+ * $vendor is optional:
+ *
+ * Windows:
+ *   HOME = Documents and Settings\$USER\Application Data
+ *   UAppData = $HOME[\$vendor]\$name
+ *
+ * Unix:
+ *   HOME = ~
+ *   UAppData = $HOME/.[$vendor/]$name
+ *
+ * Mac:
+ *   HOME = ~
+ *   UAppData = $HOME/Library/Application Support/$name
+ *
+ * Note that the "profile" member above will change the value of UAppData as
+ * follows:
+ *
+ * Windows:
+ *   UAppData = $HOME\$profile
+ *
+ * Unix:
+ *   UAppData = $HOME/.$profile
+ *
+ * Mac:
+ *   UAppData = $HOME/Library/Application Support/$profile
+ */
+#define XRE_USER_APP_DATA_DIR "UAppData"
+
+/**
+ * A directory service key which provides the executable file used to
+ * launch the current process.  This is the same value returned by the
+ * XRE_GetBinaryPath function defined below.
+ */
+#define XRE_EXECUTABLE_FILE "XREExeF"
+
+/**
+ * A directory service key which specifies the profile
+ * directory. Unlike the NS_APP_USER_PROFILE_50_DIR key, this key may
+ * be available when the profile hasn't been "started", or after is
+ * has been shut down. If the application is running without a
+ * profile, such as when showing the profile manager UI, this key will
+ * not be available. This key is provided by the XUL apprunner or by
+ * the aAppDirProvider object passed to XRE_InitEmbedding.
+ */
+#define NS_APP_PROFILE_DIR_STARTUP "ProfDS"
+
+/**
+ * A directory service key which specifies the profile
+ * directory. Unlike the NS_APP_USER_PROFILE_LOCAL_50_DIR key, this key may
+ * be available when the profile hasn't been "started", or after is
+ * has been shut down. If the application is running without a
+ * profile, such as when showing the profile manager UI, this key will
+ * not be available. This key is provided by the XUL apprunner or by
+ * the aAppDirProvider object passed to XRE_InitEmbedding.
+ */
+#define NS_APP_PROFILE_LOCAL_DIR_STARTUP "ProfLDS"
+
+/**
+ * A directory service key which specifies the system extension
+ * parent directory containing platform-specific extensions.
+ * This key may not be available on all platforms.
+ */
+#define XRE_SYS_LOCAL_EXTENSION_PARENT_DIR "XRESysLExtPD"
+
+/**
+ * A directory service key which specifies the system extension
+ * parent directory containing platform-independent extensions.
+ * This key may not be available on all platforms.
+ * Additionally, the directory may be equal to that returned by
+ * XRE_SYS_LOCAL_EXTENSION_PARENT_DIR on some platforms.
+ */
+#define XRE_SYS_SHARE_EXTENSION_PARENT_DIR "XRESysSExtPD"
+
+#if defined(XP_UNIX) || defined(XP_MACOSX)
+/**
+ * Directory service keys for the system-wide and user-specific
+ * directories where native manifests used by the WebExtensions
+ * native messaging and managed storage features are found.
+ */
+#  define XRE_SYS_NATIVE_MANIFESTS "XRESysNativeManifests"
+#  define XRE_USER_NATIVE_MANIFESTS "XREUserNativeManifests"
+#endif
+
+/**
+ * A directory service key which specifies the user system extension
+ * parent directory.
+ */
+#define XRE_USER_SYS_EXTENSION_DIR "XREUSysExt"
+
+/**
+ * A directory service key which specifies the distribution specific files for
+ * the application.
+ */
+#define XRE_APP_DISTRIBUTION_DIR "XREAppDist"
+
+/**
+ * A directory service key which specifies the location for system add-ons.
+ */
+#define XRE_APP_FEATURES_DIR "XREAppFeat"
+
+/**
+ * A directory service key which specifies the location for app dir add-ons.
+ * Should be a synonym for XCurProcD everywhere except in tests.
+ */
+#define XRE_ADDON_APP_DIR "XREAddonAppDir"
+
+/**
+ * A directory service key which specifies the distribution specific files for
+ * the application unique for each user.
+ * It's located at /run/user/$UID/<product name>/
+ */
+#define XRE_USER_RUNTIME_DIR "XREUserRunTimeDir"
+
+/**
+ * A directory service key which provides the update directory. Callers should
+ * fall back to appDir.
+ * Windows:    If vendor name exists:
+ *             ProgramData\<vendor name>\updates\
+ *             <hash of the path to XRE_EXECUTABLE_FILE's parent directory>
+ *
+ *             If vendor name doesn't exist, but product name exists:
+ *             ProgramData\<product name>\updates\
+ *             <hash of the path to XRE_EXECUTABLE_FILE's parent directory>
+ *
+ *             If neither vendor nor product name exists:
+ *             ProgramData\Mozilla\updates
+ *
+ * Mac:        ~/Library/Caches/Mozilla/updates/<absolute path to app dir>
+ *
+ * All others: Parent directory of XRE_EXECUTABLE_FILE.
+ */
+#define XRE_UPDATE_ROOT_DIR "UpdRootD"
+
+/**
+ * A directory service key which provides the *old* update directory. This
+ * path should only be used when data needs to be migrated from the old update
+ * directory.
+ * Windows:    If vendor name exists:
+ *             Documents and Settings\<User>\Local Settings\Application Data\
+ *             <vendor name>\updates\
+ *             <hash of the path to XRE_EXECUTABLE_FILE's parent directory>
+ *
+ *             If vendor name doesn't exist, but product name exists:
+ *             Documents and Settings\<User>\Local Settings\Application Data\
+ *             <product name>\updates\
+ *             <hash of the path to XRE_EXECUTABLE_FILE's parent directory>
+ *
+ *             If neither vendor nor product name exists:
+ *             Documents and Settings\<User>\Local Settings\Application Data\
+ *             Mozilla\updates
+ *
+ * This path does not exist on other operating systems
+ */
+#define XRE_OLD_UPDATE_ROOT_DIR "OldUpdRootD"
+
+/**
+ * Begin an XUL application. Does not return until the user exits the
+ * application.
+ *
+ * @param argc/argv Command-line parameters to pass to the application. On
+ *                  Windows, these should be in UTF8. On unix-like platforms
+ *                  these are in the "native" character set.
+ *
+ * @param aConfig  Information about the application to be run.
+ *
+ * @return         A native result code suitable for returning from main().
+ *
+ * @note           If the binary is linked against the standalone XPCOM glue,
+ *                 XPCOMGlueStartup() should be called before this method.
+ */
+int XRE_main(int argc, char* argv[], const mozilla::BootstrapConfig& aConfig);
+
+/**
+ * Given a path relative to the current working directory (or an absolute
+ * path), return an appropriate nsIFile object.
+ *
+ * @note Pass UTF8 strings on Windows... native charset on other platforms.
+ */
+nsresult XRE_GetFileFromPath(const char* aPath, nsIFile** aResult);
+
+/**
+ * Get the path of the running application binary and store it in aResult.
+ */
+nsresult XRE_GetBinaryPath(nsIFile** aResult);
+
+/**
+ * Register XPCOM components found in an array of files/directories.
+ * This method may be called at any time before or after XRE_main or
+ * XRE_InitEmbedding.
+ *
+ * @param aFiles An array of files or directories.
+ * @param aFileCount the number of items in the aFiles array.
+ * @note appdir/components is registered automatically.
+ *
+ * NS_APP_LOCATION specifies a location to search for binary XPCOM
+ * components as well as component/chrome manifest files.
+ *
+ * NS_EXTENSION_LOCATION excludes binary XPCOM components but allows other
+ * manifest instructions.
+ *
+ * NS_SKIN_LOCATION specifies a location to search for chrome manifest files
+ * which are only allowed to register skin packages.
+ */
+enum NSLocationType {
+  NS_APP_LOCATION,
+  NS_EXTENSION_LOCATION,
+  NS_SKIN_LOCATION,
+  NS_BOOTSTRAPPED_LOCATION
+};
+
+nsresult XRE_AddManifestLocation(NSLocationType aType, nsIFile* aLocation);
+
+/**
+ * Register XPCOM components found in a JAR.
+ * This is similar to XRE_AddManifestLocation except the file specified
+ * must be a zip archive with a manifest named chrome.manifest
+ * This method may be called at any time before or after XRE_main or
+ * XRE_InitEmbedding.
+ *
+ * @param aFiles An array of files or directories.
+ * @param aFileCount the number of items in the aFiles array.
+ * @note appdir/components is registered automatically.
+ *
+ * NS_COMPONENT_LOCATION specifies a location to search for binary XPCOM
+ * components as well as component/chrome manifest files.
+ *
+ * NS_SKIN_LOCATION specifies a location to search for chrome manifest files
+ * which are only allowed to register skin packages.
+ */
+nsresult XRE_AddJarManifestLocation(NSLocationType aType, nsIFile* aLocation);
+
+/**
+ * Parse an INI file (application.ini or override.ini) into an existing
+ * nsXREAppData structure.
+ *
+ * @param aINIFile The INI file to parse
+ * @param aAppData The nsXREAppData structure to fill.
+ */
+nsresult XRE_ParseAppData(nsIFile* aINIFile, mozilla::XREAppData& aAppData);
+
+const char* XRE_GeckoProcessTypeToString(GeckoProcessType aProcessType);
+const char* XRE_ChildProcessTypeToAnnotation(GeckoProcessType aProcessType);
+
+#if defined(MOZ_WIDGET_ANDROID)
+struct XRE_AndroidChildFds {
+  int mPrefsFd;
+  int mPrefMapFd;
+  int mIpcFd;
+  int mCrashFd;
+  int mCrashAnnotationFd;
+};
+
+void XRE_SetAndroidChildFds(JNIEnv* env, const XRE_AndroidChildFds& fds);
+#endif  // defined(MOZ_WIDGET_ANDROID)
+
+void XRE_SetProcessType(const char* aProcessTypeString);
+
+nsresult XRE_InitChildProcess(int aArgc, char* aArgv[],
+                              const XREChildData* aChildData);
+
+/**
+ * Return the GeckoProcessType of the current process.
+ */
+GeckoProcessType XRE_GetProcessType();
+
+/**
+ * Return the string representation of the GeckoProcessType of the current
+ * process.
+ */
+const char* XRE_GetProcessTypeString();
+
+/**
+ * Returns true when called in the e10s parent process.  Does *NOT* return true
+ * when called in the main process if e10s is disabled.
+ */
+bool XRE_IsE10sParentProcess();
+
+/**
+ * Defines XRE_IsParentProcess, XRE_IsContentProcess, etc.
+ *
+ * XRE_IsParentProcess is unique in that it returns true when called in
+ * the e10s parent process or called in the main process when e10s is
+ * disabled.
+ */
+#define GECKO_PROCESS_TYPE(enum_value, enum_name, string_name, proc_typename, \
+                           process_bin_type, procinfo_typename,               \
+                           webidl_typename, allcaps_name)                     \
+  bool XRE_Is##proc_typename##Process();
+#include "mozilla/GeckoProcessTypes.h"
+#undef GECKO_PROCESS_TYPE
+
+bool XRE_IsSocketProcess();
+
+/**
+ * Returns true if the appshell should run its own native event loop. Returns
+ * false if we should rely solely on the Gecko event loop.
+ */
+bool XRE_UseNativeEventProcessing();
+
+typedef void (*MainFunction)(void* aData);
+
+int XRE_RunIPDLTest(int aArgc, char* aArgv[]);
+
+nsresult XRE_RunAppShell();
+
+nsresult XRE_InitCommandLine(int aArgc, char* aArgv[]);
+
+nsresult XRE_DeinitCommandLine();
+
+void XRE_ShutdownChildProcess();
+
+MessageLoop* XRE_GetIOMessageLoop();
+
+bool XRE_SendTestShellCommand(JSContext* aCx, JSString* aCommand,
+                              JS::Value* aCallback);
+bool XRE_ShutdownTestShell();
+
+void XRE_InstallX11ErrorHandler();
+void XRE_CleanupX11ErrorHandler();
+
+void XRE_TelemetryAccumulate(int aID, uint32_t aSample);
+
+void XRE_StartupTimelineRecord(int aEvent, mozilla::TimeStamp aWhen);
+
+void XRE_InitOmnijar(nsIFile* aGreOmni, nsIFile* aAppOmni);
+void XRE_StopLateWriteChecks(void);
+
+void XRE_EnableSameExecutableForContentProc();
+
+namespace mozilla {
+enum class BinPathType { Self, PluginContainer };
+}
+mozilla::BinPathType XRE_GetChildProcBinPathType(GeckoProcessType aProcessType);
+
+int XRE_XPCShellMain(int argc, char** argv, char** envp,
+                     const XREShellData* aShellData);
+
+#ifdef LIBFUZZER
+#  include "FuzzerRegistry.h"
+
+void XRE_LibFuzzerSetDriver(LibFuzzerDriver);
+
+#endif  // LIBFUZZER
+
+#ifdef MOZ_ENABLE_FORKSERVER
+
+int XRE_ForkServer(int* aArgc, char*** aArgv);
+
+#endif  // MOZ_ENABLE_FORKSERVER
+
+#endif  // _nsXULAppAPI_h__