Stop disabling force_compositing_mode for background RenderViews.

content/browser/renderer_host/render_view_host_delegate.h

 // Copyright (c) 2012 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_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 305 matching lines @@
   // calling |callback|.
   virtual void RequestMediaAccessPermission(
       const MediaStreamRequest& request,
       const MediaResponseCallback& callback) {}
 
   // Returns the SessionStorageNamespace the render view should use. Might
   // create the SessionStorageNamespace on the fly.
   virtual SessionStorageNamespace* GetSessionStorageNamespace(
       SiteInstance* instance);
 
+  // Returns true if the RenderViewHost will never be visible.
+  virtual bool IsNeverVisible();
+
   // Returns the FrameTree the render view should use. Guaranteed to be constant
   // for the lifetime of the render view.
   //
   // TODO(ajwong): Remove once the main frame RenderFrameHost is no longer
   // created by the RenderViewHost.
   virtual FrameTree* GetFrameTree();
 
   // Invoked when an accessibility event is received from the renderer.
   virtual void AccessibilityEventReceived(
       const std::vector<AXEventNotificationDetails>& details) {}
 
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_