Canvas API. There are still a number of things to do:

runtime/embedders/openglui/common/graphics_handler.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#ifndef EMBEDDERS_OPENGLUI_COMMON_GL_GRAPHICS_HANDLER_H_
-#define EMBEDDERS_OPENGLUI_COMMON_GL_GRAPHICS_HANDLER_H_
+#ifndef EMBEDDERS_OPENGLUI_COMMON_GRAPHICS_HANDLER_H_
+#define EMBEDDERS_OPENGLUI_COMMON_GRAPHICS_HANDLER_H_
 
-#include "embedders/openglui/common/graphics_handler.h"
+#include "embedders/openglui/common/isized.h"
 #include "embedders/openglui/common/opengl.h"
+#include "embedders/openglui/common/support.h"
 #include "embedders/openglui/common/timer.h"
 
-class GLGraphicsHandler : public GraphicsHandler {
+class GraphicsHandler : public ISized {
   public:
-    GLGraphicsHandler()
-      : GraphicsHandler() {
+    GraphicsHandler();
+
+    const int32_t& height() {
+      return height_;
     }
 
-    virtual int32_t Start() = 0;
-    virtual void Stop() = 0;
+    const int32_t& width() {
+      return width_;
+    }
+
+    void ApplyOrtho(float maxX, float maxY) const;
+    void ApplyRotation(float degrees) const;
+
+    virtual int32_t Start();
+    virtual void Stop();
 
     void SwapBuffers() {
       GLSwapBuffers();
     }
 
-    virtual int32_t Update() {
-      SwapBuffers();
-      return 0;
+    virtual int32_t Update();
+
+    void SetViewport(int left, int top, int width, int height);
+
+    SkCanvas* CreateCanvas();
+
+    void Flush() {
+      // TODO(gram): see if we really need this.
+      grcontext->flush();
     }
 
-    void SetViewport(int left, int top, int width, int height);
-    int BuildProgram(const char* vertexShaderSource,
-                     const char* fragmentShaderSource) const;
-    int BuildShader(const char* source, GLenum shaderType) const;
+    virtual ~GraphicsHandler() {
+    }
 
-    virtual ~GLGraphicsHandler() {
-    }
+  protected:
+    SkAutoGraphics ag;
+    GrContext* grcontext;
+    int32_t width_, height_;
 };
 
-#endif  // EMBEDDERS_OPENGLUI_COMMON_GL_GRAPHICS_HANDLER_H_
+extern GraphicsHandler* graphics;
 
+#endif  // EMBEDDERS_OPENGLUI_COMMON_GRAPHICS_HANDLER_H_
+