cc: Add tile-free software compositing mode.

cc/output/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_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
@@ skipping 48 matching lines @@
   // In the event of a lost context, the entire output surface should be
   // recreated.
   WebKit::WebGraphicsContext3D* context3d() const {
     return context3d_.get();
   }
 
   SoftwareOutputDevice* software_device() const {
     return software_device_.get();
   }
 
+  // In the case where both the context3d and software_device are present
+  // (namely Android WebView), this is called to determine whether the software
+  // device should be used on the current frame.
+  virtual bool ForcedDrawToSoftwareDevice() const;
+
   // 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* client);
 
   // Sends frame data to the parent compositor. This should only be called when
   // capabilities().has_parent_compositor. The implementation may destroy or
   // steal the contents of the CompositorFrame passed in.
   virtual void SendFrameToParentCompositor(CompositorFrame* frame);
@@ skipping 26 matching lines @@
 
   scoped_ptr<OutputSurfaceCallbacks> callbacks_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_