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

Source/Platform/chromium/public/WebLayerTreeView.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 76 matching lines @@
     bool isNull() const { return m_private.isNull(); }
 
 #define WEBLAYERTREEVIEW_HAS_INITIALIZE
     // Initialization and lifecycle --------------------------------------
 
     // Attempts to initialize this WebLayerTreeView with the given client, root layer, and settings.
     // If initialization fails, this will return false and .isNull() will return true.
     // Must be called before any methods below.
     WEBKIT_EXPORT bool initialize(WebLayerTreeViewClient*, const WebLayer& root, const Settings&);
 
+    // Indicates that the compositing surface used by this WebLayerTreeView is ready to use.
+    // A WebLayerTreeView may request a context from its client before the surface is ready,
+    // but it won't attempt to use it.
+    WEBKIT_EXPORT void setSurfaceReady();
+
     // Sets the root of the tree. The root is set by way of the constructor.
     // This is typically used to explicitly set the root to null to break
     // cycles.
     WEBKIT_EXPORT void setRootLayer(WebLayer*);
 
     // Returns a unique identifier that can be used on the compositor thread to request a
     // WebCompositorInputHandler instance.
     WEBKIT_EXPORT int compositorIdentifier();
 
 
@@ skipping 75 matching lines @@
 }
 
 inline bool operator!=(const WebLayerTreeView& a, const WebLayerTreeView& b)
 {
     return !(a == b);
 }
 
 } // namespace WebKit
 
 #endif // WebLayerTreeView_h