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diff --git a/accessible/android/SessionAccessibility.h b/accessible/android/SessionAccessibility.h
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+++ b/accessible/android/SessionAccessibility.h
@@ -0,0 +1,122 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 mozilla_a11y_SessionAccessibility_h_
+#define mozilla_a11y_SessionAccessibility_h_
+
+#include "mozilla/java/SessionAccessibilityNatives.h"
+#include "mozilla/widget/GeckoViewSupport.h"
+#include "nsAppShell.h"
+#include "nsThreadUtils.h"
+#include "nsWindow.h"
+#include "AccessibleWrap.h"
+
+namespace mozilla {
+namespace a11y {
+
+class AccessibleWrap;
+class AccAttributes;
+class Accessible;
+class RemoteAccessible;
+class RootAccessibleWrap;
+class BatchData;
+
+class SessionAccessibility final
+    : public java::SessionAccessibility::NativeProvider::Natives<
+          SessionAccessibility> {
+ public:
+  typedef java::SessionAccessibility::NativeProvider::Natives<
+      SessionAccessibility>
+      Base;
+
+  SessionAccessibility(
+      jni::NativeWeakPtr<widget::GeckoViewSupport> aWindow,
+      java::SessionAccessibility::NativeProvider::Param aSessionAccessibility);
+
+  void OnWeakNonIntrusiveDetach(already_AddRefed<Runnable> aDisposer) {
+    SetAttached(false, std::move(aDisposer));
+  }
+
+  const java::SessionAccessibility::NativeProvider::Ref&
+  GetJavaAccessibility() {
+    return mSessionAccessibility;
+  }
+
+  static void Init();
+  static RefPtr<SessionAccessibility> GetInstanceFor(Accessible* aAccessible);
+  static RefPtr<SessionAccessibility> GetInstanceFor(PresShell* aPresShell);
+
+  // Native implementations
+  using Base::AttachNative;
+  using Base::DisposeNative;
+  void GetNodeInfo(int32_t aID, mozilla::jni::Object::Param aNodeInfo);
+  int GetNodeClassName(int32_t aID);
+  void SetText(int32_t aID, jni::String::Param aText);
+  void Click(int32_t aID);
+  bool Pivot(int32_t aID, int32_t aGranularity, bool aForward, bool aInclusive);
+  void ExploreByTouch(int32_t aID, float aX, float aY);
+  void NavigateText(int32_t aID, int32_t aGranularity, int32_t aStartOffset,
+                    int32_t aEndOffset, bool aForward, bool aSelect);
+  void SetSelection(int32_t aID, int32_t aStart, int32_t aEnd);
+  void Cut(int32_t aID);
+  void Copy(int32_t aID);
+  void Paste(int32_t aID);
+  void StartNativeAccessibility();
+
+  // Event methods
+  void SendFocusEvent(Accessible* aAccessible);
+  void SendScrollingEvent(Accessible* aAccessible, int32_t aScrollX,
+                          int32_t aScrollY, int32_t aMaxScrollX,
+                          int32_t aMaxScrollY);
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY
+  void SendAccessibilityFocusedEvent(Accessible* aAccessible);
+  void SendHoverEnterEvent(Accessible* aAccessible);
+  void SendTextSelectionChangedEvent(Accessible* aAccessible,
+                                     int32_t aCaretOffset);
+  void SendTextTraversedEvent(Accessible* aAccessible, int32_t aStartOffset,
+                              int32_t aEndOffset);
+  void SendTextChangedEvent(Accessible* aAccessible, const nsAString& aStr,
+                            int32_t aStart, uint32_t aLen, bool aIsInsert,
+                            bool aFromUser);
+  void SendSelectedEvent(Accessible* aAccessible, bool aSelected);
+  void SendClickedEvent(Accessible* aAccessible, uint32_t aFlags);
+  void SendWindowContentChangedEvent();
+  void SendWindowStateChangedEvent(Accessible* aAccessible);
+  void SendAnnouncementEvent(Accessible* aAccessible,
+                             const nsAString& aAnnouncement,
+                             uint16_t aPriority);
+
+  Accessible* GetAccessibleByID(int32_t aID) const;
+
+  static const int32_t kNoID = -1;
+  static const int32_t kUnsetID = 0;
+
+  static void RegisterAccessible(Accessible* aAccessible);
+  static void UnregisterAccessible(Accessible* aAccessible);
+  static void UnregisterAll(PresShell* aPresShell);
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SessionAccessibility)
+
+ private:
+  ~SessionAccessibility() {}
+
+  void PopulateNodeInfo(Accessible* aAccessible,
+                        mozilla::jni::Object::Param aNodeInfo);
+
+  void SetAttached(bool aAttached, already_AddRefed<Runnable> aRunnable);
+
+  jni::NativeWeakPtr<widget::GeckoViewSupport> mWindow;  // Parent only
+  java::SessionAccessibility::NativeProvider::GlobalRef mSessionAccessibility;
+
+  /*
+   * This provides a mapping from 32 bit id to accessible objects.
+   */
+  nsTHashMap<nsUint32HashKey, Accessible*> mIDToAccessibleMap;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif