Make cc output surface creation async

cc/trees/proxy.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TREES_PROXY_H_
 #define CC_TREES_PROXY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 34 matching lines @@
   void SetMainThreadBlocked(bool is_main_thread_blocked);
   void SetCurrentThreadIsImplThread(bool is_impl_thread);
 #endif
 
   virtual ~Proxy();
 
   virtual void FinishAllRendering() = 0;
 
   virtual bool IsStarted() const = 0;
 
+  virtual void SetOutputSurface(scoped_ptr<OutputSurface>) = 0;

[danakj, 2014/06/25 17:43:09]

Can you add comment about how this will cause
LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted to be called with the
result.

[enne (OOO), 2014/06/25 21:25:05]

Done.  After this patch, I want to revist that and maybe just have LTH call it
directly (since this is really indirect).

[danakj, 2014/06/25 21:25:50]

+1

+
   // Indicates that the compositing surface associated with our context is
   // ready to use.
   virtual void SetLayerTreeHostClientReady() = 0;
 
   virtual void SetVisible(bool visible) = 0;
 
   virtual const RendererCapabilities& GetRendererCapabilities() const = 0;
 
   virtual void SetNeedsAnimate() = 0;
   virtual void SetNeedsUpdateLayers() = 0;
@@ skipping 72 matching lines @@
   explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) {}
   ~DebugScopedSetMainThreadBlocked() {}
  private:
   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
 };
 #endif
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROXY_H_