Support for non-DOM canvases/contexts (backed by bitaps).

runtime/embedders/openglui/common/graphics_handler.h

Index: runtime/embedders/openglui/common/graphics_handler.h
===================================================================
--- runtime/embedders/openglui/common/graphics_handler.h	(revision 18200)
+++ runtime/embedders/openglui/common/graphics_handler.h	(working copy)
@@ -36,13 +36,9 @@
 
     void SetViewport(int left, int top, int width, int height);
 
-    SkCanvas* CreateCanvas();
+    SkCanvas* CreateDisplayCanvas();
+    SkCanvas* CreateBitmapCanvas(int width, int height);
 
-    void Flush() {
-      // TODO(gram): see if we really need this.
-      grcontext->flush();
-    }
-
     virtual ~GraphicsHandler() {
     }