Add very simple cc::Display implementation for surfaces.

cc/surfaces/surface.h

Index: cc/surfaces/surface.h
diff --git a/cc/surfaces/surface.h b/cc/surfaces/surface.h
index 8ed4399a6abe89702f4a5d430a47472b29620d3e..39ba1b7e1b5a7ba642f8dd28a4d87ccca0990e81 100644
--- a/cc/surfaces/surface.h
+++ b/cc/surfaces/surface.h
@@ -29,6 +29,8 @@ class CC_SURFACES_EXPORT Surface {
   // Returns the most recent frame that is eligible to be rendered.
   CompositorFrame* GetEligibleFrame();
 
+  scoped_ptr<CompositorFrame> TakeFrame();

[jamesr, 2014/05/28 22:01:28]

this isn't right - a surface retains ownership of the frame always. to draw a
frame from a surface, you have to clone it or (more likely) aggregate it into a
unified frame that includes data from all referenced surfaces. it's easy enough
to just stack allocate an aggregator and run it to get a frame for one surface
which effectively just copies the data

+
  private:
   SurfaceManager* manager_;
   SurfaceClient* client_;