[Bindings] Create and use V8 context snapshots

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 <stdint.h>
 
 #include "base/files/file.h"
@@ skipping 12 matching lines @@
   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);
+  static void GetV8ContextData(const char** snapshot_data_out,

[Yuki, 2017/04/28 13:48:28]

GetV8ContextSnapshotData?

[peria, 2017/06/01 08:33:31]

Done.

+                               int* snapshot_size_out);
 
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
 
   // Load V8 snapshot from user provided platform file descriptors.
   // The offset and size arguments, if non-zero, specify the portions
   // of the files to be loaded. Since the VM can boot with or without
   // the snapshot, this function does not return a status.
   static void LoadV8SnapshotFromFD(base::PlatformFile snapshot_fd,
                                    int64_t snapshot_offset,
                                    int64_t snapshot_size);
@@ skipping 26 matching lines @@
 #if defined(OS_ANDROID)
   static base::PlatformFile GetOpenSnapshotFileForChildProcesses(
       base::MemoryMappedFile::Region* region_out,
       bool abi_32_bit);
 
   static base::FilePath GetNativesFilePath();
   static base::FilePath GetSnapshotFilePath(bool abi_32_bit);
 #endif
 
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
+
+  static void LoadV8ContextFromFD(base::PlatformFile snapshot_fd,
+                                  int64_t snapshot_offset,
+                                  int64_t snapshot_size);
+  static void LoadV8Context();
+  static base::PlatformFile GetOpenV8ContextFileForChildProcesses(
+      base::MemoryMappedFile::Region* region_out);
+#if defined(OS_ANDROID)
+  static base::FilePath GetV8ContextFilePath();
+#endif
 };
 
 }  // namespace gin
 
 #endif  // GIN_V8_INITIALIZER_H_