Reland of Revert of gpu: introduce glCopySubTextureCHROMIUM (patchset #1 id:1 of https://codereview…

gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2chromium.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
 #include "base/bind.h"
@@ skipping 91 matching lines @@
   EXPECT_TRUE(gl_.decoder()->GetImageManager()->LookupImage(image_id) != NULL);
 
   // Bind the texture and the image.
   glBindTexture(GL_TEXTURE_2D, texture_ids_[0]);
   glBindTexImage2DCHROMIUM(GL_TEXTURE_2D, image_id);
 
   // Copy texture so we can verify result using CheckPixels.
   glCopyTextureCHROMIUM(GL_TEXTURE_2D,
                         texture_ids_[0],
                         texture_ids_[1],
-                        0,
                         GL_RGBA,
                         GL_UNSIGNED_BYTE);
   EXPECT_TRUE(glGetError() == GL_NO_ERROR);
 
   // Check if pixels match the values that were assigned to the mapped buffer.
   GLTestHelper::CheckPixels(0, 0, kImageWidth, kImageHeight, 0, pixels);
   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 
   // Release the image.
   glReleaseTexImage2DCHROMIUM(GL_TEXTURE_2D, image_id);
 
   // Destroy the image.
   glDestroyImageCHROMIUM(image_id);
 }
 
 }  // namespace gles2
 }  // namespace gpu