Revert of Chromium plumbing for Screen Orientation API orientationchange events.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index d2fbe9a5599def233956b3e7a109e8ed8db016d1..2fea65613408453a2a9add5309e06e6d5529879e 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -46,7 +46,6 @@
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class RenderWidgetHostViewFrameSubscriber;
-class ScreenOrientationDispatcherHost;
 class StoragePartition;
 class StoragePartitionImpl;
 
@@ -170,9 +169,6 @@
   void WebRtcLogMessage(const std::string& message);
 #endif
 
-  scoped_refptr<ScreenOrientationDispatcherHost>
-      screen_orientation_dispatcher_host() const;
-
   // Register/unregister the host identified by the host id in the global host
   // list.
   static void RegisterHost(int host_id, RenderProcessHost* host);
@@ -412,9 +408,6 @@
   // Lives on the browser's ChildThread.
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
-  // Message filter and dispatcher for screen orientation.
-  ScreenOrientationDispatcherHost* screen_orientation_dispatcher_host_;
-
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };