A64: Synchronize with r18147.

src/extensions/free-buffer-extension.h

Index: src/extensions/free-buffer-extension.h
diff --git a/src/default-platform.h b/src/extensions/free-buffer-extension.h
similarity index 76%
copy from src/default-platform.h
copy to src/extensions/free-buffer-extension.h
index fe1bf8e2d64e57349309fdab70c973af2fb99eb9..22d466f61e02b4e8367dfc9d06f00095aa5efe02 100644
--- a/src/default-platform.h
+++ b/src/extensions/free-buffer-extension.h
@@ -25,31 +25,25 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_DEFAULT_PLATFORM_H_
-#define V8_DEFAULT_PLATFORM_H_
+#ifndef V8_EXTENSIONS_FREE_BUFFER_EXTENSION_H_
+#define V8_EXTENSIONS_FREE_BUFFER_EXTENSION_H_
 
 #include "v8.h"
 
 namespace v8 {
 namespace internal {
 
-class DefaultPlatform : public Platform {
+class FreeBufferExtension : public v8::Extension {
  public:
-  DefaultPlatform();
-  virtual ~DefaultPlatform();
-
-  // v8::Platform implementation.
-  virtual void CallOnBackgroundThread(
-      Task *task, ExpectedRuntime expected_runtime) V8_OVERRIDE;
-  virtual void CallOnForegroundThread(v8::Isolate *isolate,
-                                      Task *task) V8_OVERRIDE;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DefaultPlatform);
+  explicit FreeBufferExtension(const char* source)
+      : v8::Extension("v8/free-buffer", source) {}
+  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
+      v8::Isolate* isolate,
+      v8::Handle<v8::String> name);
+  static void FreeBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void Register();
 };
 
-
 } }  // namespace v8::internal
 
-
-#endif  // V8_DEFAULT_PLATFORM_H_
+#endif  // V8_EXTENSIONS_FREE_BUFFER_EXTENSION_H_