Make cross-process CALayers work on Mac

content/browser/renderer_host/render_widget_host_view_mac.h

Index: content/browser/renderer_host/render_widget_host_view_mac.h
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.h b/content/browser/renderer_host/render_widget_host_view_mac.h
index b370e02b7110b6e4605d5f8aacfee14a8719b0a3..cb4efdb9dfcbba18e097b059c0c83564724fb979 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -30,6 +30,7 @@
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
 #include "ui/base/cocoa/base_view.h"
+#include "ui/base/cocoa/remote_layer_api.h"
 
 struct ViewHostMsg_TextInputState_Params;
 
@@ -420,6 +421,9 @@ class CONTENT_EXPORT RenderWidgetHostViewMac
   // The compositing or software layers will be added as sublayers to this.
   base::scoped_nsobject<CALayer> background_layer_;
 
+  // The CoreAnimation layer hosted by the GPU process.
+  base::scoped_nsobject<CALayerHost> remote_layer_host_;
+
   // The CoreAnimation layer for software compositing. This should be NULL
   // when software compositing is not in use.
   base::scoped_nsobject<SoftwareLayer> software_layer_;