Adds BeginFrameControl via DevTools.

content/browser/web_contents/web_contents_view_child_frame.h

 // Copyright (c) 2016 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_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_CHILD_FRAME_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_CHILD_FRAME_H_
 
 #include "base/macros.h"
 #include "content/browser/renderer_host/render_view_host_delegate_view.h"
 #include "content/browser/web_contents/web_contents_view.h"
@@ skipping 29 matching lines @@
                   gfx::NativeView context) override;
   RenderWidgetHostViewBase* CreateViewForWidget(
       RenderWidgetHost* render_widget_host,
       bool is_guest_view_hack) override;
   RenderWidgetHostViewBase* CreateViewForPopupWidget(
       RenderWidgetHost* render_widget_host) override;
   void SetPageTitle(const base::string16& title) override;
   void RenderViewCreated(RenderViewHost* host) override;
   void RenderViewSwappedIn(RenderViewHost* host) override;
   void SetOverscrollControllerEnabled(bool enabled) override;
+  ui::Compositor* GetCompositor() const override;
 #if defined(OS_MACOSX)
   void SetAllowOtherViews(bool allow) override;
   bool GetAllowOtherViews() const override;
   bool IsEventTracking() const override;
   void CloseTabAfterEventTracking() override;
 #endif
 
   // Backend implementation of RenderViewHostDelegateView.
   void ShowContextMenu(RenderFrameHost* render_frame_host,
                        const ContextMenuParams& params) override;
@@ skipping 15 matching lines @@
 
   // The delegate ownership is passed to WebContentsView.
   std::unique_ptr<WebContentsViewDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewChildFrame);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_CHILD_FRAME_H_