Make <webview> use out-of-process iframe architecture.

extensions/renderer/guest_view/guest_view_internal_custom_bindings.h

 // Copyright 2014 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 EXTENSIONS_RENDERER_GUEST_VIEW_GUEST_VIEW_INTERNAL_CUSTOM_BINDINGS_H_
 #define EXTENSIONS_RENDERER_GUEST_VIEW_GUEST_VIEW_INTERNAL_CUSTOM_BINDINGS_H_
 
 #include "extensions/renderer/object_backed_native_handler.h"
 
 namespace extensions {
@@ skipping 28 matching lines @@
   // |callback| is an optional callback that is called once the container has
   // been detached.
   void DetachGuest(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // RegisterDestructionCallback registers a JavaScript callback function to be
   // called when the guestview's container is destroyed.
   // RegisterDestructionCallback takes in a single paramater, |callback|.
   void RegisterDestructionCallback(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
+  void AttachIframeGuest(
+      const v8::FunctionCallbackInfo<v8::Value>& args);
+
   // RegisterElementResizeCallback registers a JavaScript callback function to
   // be called when the element is resized. RegisterElementResizeCallback takes
   // a single parameter, |callback|.
   void RegisterElementResizeCallback(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_GUEST_VIEW_GUEST_VIEW_INTERNAL_CUSTOM_BINDINGS_H_