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diff --git a/toolkit/crashreporter/google-breakpad/src/tools/mac/crash_report/on_demand_symbol_supplier.h b/toolkit/crashreporter/google-breakpad/src/tools/mac/crash_report/on_demand_symbol_supplier.h
new file mode 100644
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+++ b/toolkit/crashreporter/google-breakpad/src/tools/mac/crash_report/on_demand_symbol_supplier.h
@@ -0,0 +1,111 @@
+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// on_demand_symbol_supplier.h: Provides a Symbol Supplier that will create
+// a breakpad symbol file on demand.
+
+#ifndef TOOLS_MAC_CRASH_REPORT_ON_DEMAND_SYMBOL_SUPPLIER_H__
+#define TOOLS_MAC_CRASH_REPORT_ON_DEMAND_SYMBOL_SUPPLIER_H__
+
+#include <map>
+#include <string>
+#include "google_breakpad/processor/symbol_supplier.h"
+
+namespace google_breakpad {
+
+using std::map;
+using std::string;
+class MinidumpModule;
+
+class OnDemandSymbolSupplier : public SymbolSupplier {
+ public:
+  // |search_dir| is the directory to search for alternative symbols with
+  // the same name as the module in the minidump
+  OnDemandSymbolSupplier(const string &search_dir,
+                         const string &symbol_search_dir);
+  virtual ~OnDemandSymbolSupplier() {}
+
+  // Returns the path to the symbol file for the given module.
+  virtual SymbolResult GetSymbolFile(const CodeModule *module,
+                                     const SystemInfo *system_info,
+                                     string *symbol_file);
+
+  // Returns the path to the symbol file for the given module.
+  virtual SymbolResult GetSymbolFile(const CodeModule *module,
+                                     const SystemInfo *system_info,
+                                     string *symbol_file,
+                                     string *symbol_data);
+  // Allocates data buffer on heap, and takes the ownership of
+  // the data buffer.
+  virtual SymbolResult GetCStringSymbolData(const CodeModule *module,
+                                            const SystemInfo *system_info,
+                                            string *symbol_file,
+                                            char **symbol_data,
+                                            size_t *symbol_data_size);
+
+  // Delete the data buffer allocated for module in GetCStringSymbolData().
+  virtual void FreeSymbolData(const CodeModule *module);
+
+ protected:
+  // Search directory
+  string search_dir_;
+  string symbol_search_dir_;
+
+  // When we create a symbol file for a module, save the name of the module
+  // and the path to that module's symbol file.
+  map<string, string> module_file_map_;
+
+  // Map of allocated data buffers, keyed by module->code_file().
+  map<string, char *> memory_buffers_;
+
+  // Return the name for |module|  This will be the value used as the key
+  // to the |module_file_map_|.
+  string GetNameForModule(const CodeModule *module);
+
+  // Find the module on local system.  If the module resides in a different
+  // location than the full path in the minidump, this will be the location
+  // used.
+  string GetLocalModulePath(const CodeModule *module);
+
+  // Return the full path for |module|.
+  string GetModulePath(const CodeModule *module);
+
+  // Return the path to the symbol file for |module|.  If an empty string is
+  // returned, then |module| doesn't have a symbol file.
+  string GetModuleSymbolFile(const CodeModule *module);
+
+  // Generate the breakpad symbol file for |module|.  Return true if successful.
+  // File is generated in /tmp.
+  bool GenerateSymbolFile(const CodeModule *module,
+                          const SystemInfo *system_info);
+};
+
+}  // namespace google_breakpad
+
+#endif  // TOOLS_MAC_CRASH_REPORT_ON_DEMAND_SYMBOL_SUPPLIER_H__