Merge 114800 - [chromium] Plumb a compositor surface ready notification through to the threaded com…

Source/WebKit/chromium/public/WebWidget.h

Index: Source/WebKit/chromium/public/WebWidget.h
===================================================================
--- Source/WebKit/chromium/public/WebWidget.h	(revision 114977)
+++ Source/WebKit/chromium/public/WebWidget.h	(working copy)
@@ -40,6 +40,7 @@
 #include "platform/WebSize.h"
 
 #define WEBKIT_HAS_NEW_FULLSCREEN_API 1
+#define WEBWIDGET_HAS_SETCOMPOSITORSURFACEREADY 1
 
 namespace WebKit {
 
@@ -107,6 +108,10 @@
     // animate or layout in this case.
     virtual void composite(bool finish) = 0;
 
+    // Indicates that the compositing surface associated with this WebWidget is
+    // ready to use.
+    virtual void setCompositorSurfaceReady() = 0;
+
     // Temporary method for the embedder to notify the WebWidget that the widget
     // has taken damage, e.g. due to a window expose. This method will be
     // removed when the WebWidget inversion patch lands --- http://crbug.com/112837