Set V8 extras mode in gin::V8Initializer.

gin/v8_initializer.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GIN_V8_INITIALIZER_H_
 #define GIN_V8_INITIALIZER_H_
 
 #include "base/files/file.h"
 #include "base/files/memory_mapped_file.h"
 #include "gin/array_buffer.h"
 #include "gin/gin_export.h"
 #include "gin/public/isolate_holder.h"
 #include "gin/public/v8_platform.h"
 #include "v8/include/v8.h"
 
 namespace gin {
 
 class GIN_EXPORT V8Initializer {
  public:
   // This should be called by IsolateHolder::Initialize().
-  static void Initialize(gin::IsolateHolder::ScriptMode mode);
+  static void Initialize(IsolateHolder::ScriptMode mode,
+                         IsolateHolder::V8ExtrasMode v8_extras_mode);
 
   // Get address and size information for currently loaded snapshot.
   // If no snapshot is loaded, the return values are null for addresses
   // and 0 for sizes.
   static void GetV8ExternalSnapshotData(const char** natives_data_out,
                                         int* natives_size_out,
                                         const char** snapshot_data_out,
                                         int* snapshot_size_out);
 
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
@@ skipping 29 matching lines @@
   // Use with LoadV8SnapshotFromFD().
   // Will return -1 if the file does not exist.
   static base::PlatformFile GetOpenSnapshotFileForChildProcesses(
       base::MemoryMappedFile::Region* region_out);
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 };
 
 }  // namespace gin
 
 #endif  // GIN_V8_INITIALIZER_H_