Add swapBuffer call to SkGLContextHelper.

include/gpu/gl/SkANGLEGLContext.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkANGLEGLContext_DEFINED
 #define SkANGLEGLContext_DEFINED
 
 #if SK_ANGLE
 
 #include "SkGLContextHelper.h"
 
 #include <GLES2/gl2.h>
 #include <EGL/egl.h>
 
 class SkANGLEGLContext : public SkGLContextHelper {
 public:
     SkANGLEGLContext();
 
     virtual ~SkANGLEGLContext();
 
     virtual void makeCurrent() const SK_OVERRIDE;
+    virtual void swapBuffers() const SK_OVERRIDE;
 
     class AutoContextRestore {
     public:
         AutoContextRestore();
         ~AutoContextRestore();
 
     private:
         EGLContext fOldEGLContext;
         EGLDisplay fOldDisplay;
         EGLSurface fOldSurface;
     };
 
 protected:
     virtual const GrGLInterface* createGLContext() SK_OVERRIDE;
     virtual void destroyGLContext() SK_OVERRIDE;
 
 private:
     EGLContext fContext;
     EGLDisplay fDisplay;
     EGLSurface fSurface;
 };
 
 #endif
 
 #endif