Stop disabling force_compositing_mode for background RenderViews.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index b869a52af7f64752cdecf2221e02ada453e3e4f8..cbea36948e3f0f11c4882c2f746b1e78dbf19ad3 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -461,6 +461,9 @@ class CONTENT_EXPORT WebContentsDelegate {
   virtual void MoveValidationMessage(WebContents* web_contents,
                                      const gfx::Rect& anchor_in_root_view) {}
 
+  // Returns true if the WebContents is never visible.
+  virtual bool IsWebContentsNeverVisible(WebContents* web_contents);

[jam, 2014/04/14 22:43:01]

nit: since this is on WebContentsDelegate, the "WebContents" in the method name
is redundant. just call it IsNeverVisible

[danakj, 2014/04/14 22:47:30]

Done.

+
  protected:
   virtual ~WebContentsDelegate();