Replace the gc extension in content shell with a gin::Wrappable class

content/shell/renderer/gc_controller.h

Index: content/shell/renderer/gc_controller.h
diff --git a/content/shell/renderer/gc_controller.h b/content/shell/renderer/gc_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..52179911cf1a2e2fad566200fb6286588c91f723
--- /dev/null
+++ b/content/shell/renderer/gc_controller.h
@@ -0,0 +1,42 @@
+// 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 CONTENT_SHELL_RENDERER_GC_CONTROLLER_H_
+#define CONTENT_SHELL_RENDERER_GC_CONTROLLER_H_
+
+#include "base/basictypes.h"
+#include "gin/wrappable.h"
+
+namespace blink {
+class WebFrame;
+}
+
+namespace gin {
+class Arguments;
+}
+
+namespace content {
+
+class GCController : public gin::Wrappable<GCController> {
+ public:
+  static gin::WrapperInfo kWrapperInfo;
+  static void Install(blink::WebFrame* frame);
+
+ private:
+  GCController();
+  virtual ~GCController();
+
+  // gin::Wrappable.
+  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) OVERRIDE;
+
+  void Collect(const gin::Arguments& args);
+  void MinorCollect(const gin::Arguments& args);
+
+  DISALLOW_COPY_AND_ASSIGN(GCController);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_RENDERER_GC_CONTROLLER_H_