Remove unused sk_app::WindowContext::presentRenderSurface

tools/viewer/sk_app/GLWindowContext.cpp

 
 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrContext.h"
 #include "SkSurface.h"
@@ skipping 71 matching lines @@
             desc.fRenderTargetHandle = buffer;
 
             fSurface = this->createRenderSurface(desc, fActualColorBits);
         }
     }
 
     return fSurface;
 }
 
 void GLWindowContext::swapBuffers() {
-    this->presentRenderSurface(fSurface, fRenderTarget, fActualColorBits);
     this->onSwapBuffers();
 }
 
 void GLWindowContext::resize(int  w, int h) {
     this->destroyContext();
     this->initializeContext();
 }
 
 void GLWindowContext::setDisplayParams(const DisplayParams& params) {
     this->destroyContext();
     fDisplayParams = params;
     this->initializeContext();
 }
 
 }   //namespace sk_app