gpu: Add CHROMIUM_copy_image extension.

ui/gl/gl_image_surface_texture.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 "ui/gl/gl_image_surface_texture.h"
 
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/android/surface_texture.h"
 
 namespace gl {
@@ skipping 71 matching lines @@
 bool GLImageSurfaceTexture::CopyTexImage(unsigned target) {
   return false;
 }
 
 bool GLImageSurfaceTexture::CopyTexSubImage(unsigned target,
                                             const gfx::Point& offset,
                                             const gfx::Rect& rect) {
   return false;
 }
 
+bool GLImageSurfaceTexture::CopySubImageData(unsigned texture_id,
+                                             const gfx::Point& offset,
+                                             const gfx::Rect& rect,
+                                             GLFence* in_fence,
+                                             GLFence* out_fence) {
+  return false;
+}
+
 bool GLImageSurfaceTexture::ScheduleOverlayPlane(
     gfx::AcceleratedWidget widget,
     int z_order,
     gfx::OverlayTransform transform,
     const gfx::Rect& bounds_rect,
     const gfx::RectF& crop_rect) {
   return false;
 }
 
 void GLImageSurfaceTexture::OnMemoryDump(
     base::trace_event::ProcessMemoryDump* pmd,
     uint64_t process_tracing_id,
     const std::string& dump_name) {
   // TODO(ericrk): Add OnMemoryDump for GLImages. crbug.com/514914
 }
 
 }  // namespace gl