cc: Move WebCompositorOutputSurface and related classes into cc/

cc/output_surface.h

 // Copyright 2012 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_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_SURFACE_H_
 
-#include <public/WebCompositorOutputSurface.h>
+#define USE_CC_OUTPUT_SURFACE // TODO(danakj): Remove this.
+
+#include "third_party/WebKit/Source/Platform/chromium/public/WebCompositorOutputSurface.h"
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
 namespace cc {
 
-// TODO(danakj): Move WebCompositorOutputSurface implementation to here.
-typedef WebKit::WebCompositorOutputSurface OutputSurface;
+class CompositorFrame;
+class OutputSurfaceClient;
+class SoftwareOutputDevice;
+
+// Represents the output surface for a compositor. The compositor owns
+// and manages its destruction. Its lifetime is:
+//   1. Created on the main thread by the LayerTreeHost through its client.
+//   2. Passed to the compositor thread and bound to a client via BindToClient.
+//      From here on, it will only be used on the compositor thread.
+//   3. If the 3D context is lost, then the compositor will delete the output
+//      surface (on the compositor thread) and go back to step 1.
+class OutputSurface : public WebKit::WebCompositorOutputSurface {
+ public:
+  virtual ~OutputSurface() {}
+
+  // Called by the compositor on the compositor thread. This is a place where
+  // thread-specific data for the output surface can be initialized, since from
+  // this point on the output surface will only be used on the compositor
+  // thread.
+  virtual bool BindToClient(OutputSurfaceClient*) = 0;
+
+  struct Capabilities {
+    Capabilities()
+        : has_parent_compositor(false) {}
+
+    bool has_parent_compositor;
+  };
+
+  virtual const Capabilities& Capabilities() const = 0;
+
+  // Obtain the 3d context or the software device associated with this output
+  // surface. Either of these may return a null pointer, but not both.
+  // In the event of a lost context, the entire output surface should be
+  // recreated.
+  virtual WebKit::WebGraphicsContext3D* Context3D() const = 0;
+  virtual SoftwareOutputDevice* SoftwareDevice() const = 0;
+
+  // Sends frame data to the parent compositor. This should only be called when
+  // capabilities().has_parent_compositor.
+  virtual void SendFrameToParentCompositor(const CompositorFrame&) {}
+};
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SURFACE_H_