content: Remove blimp compositing dependencies.

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 9d3db1efb792cc6c6efcb6a5be7fc41cec5e4e65..6456878bd456cf878f75660e0a3887625e674ca2 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -546,12 +546,6 @@ class CONTENT_EXPORT WebContentsDelegate {
       WebContents* web_contents,
       scoped_refptr<net::X509Certificate> certificate);
 
-  // Called when the active render widget is forwarding a RemoteChannel
-  // compositor proto.  This is used in Blimp mode.
-  virtual void ForwardCompositorProto(
-      RenderWidgetHost* render_widget_host,
-      const std::vector<uint8_t>& proto) {}
-
   // Requests the app banner. This method is called from the DevTools.
   virtual void RequestAppBannerFromDevTools(content::WebContents* web_contents);