gpu: Add CHROMIUM_copy_image extension.

ui/gl/gl_image_io_surface.mm

 // Copyright 2013 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_io_surface.h"
 
 #include <map>
 
 #include "base/callback_helpers.h"
 #include "base/mac/bind_objc_block.h"
@@ skipping 331 matching lines @@
   yuv_to_rgb_converter->CopyYUV420ToRGB(target, size_, rgb_texture);
   return true;
 }
 
 bool GLImageIOSurface::CopyTexSubImage(unsigned target,
                                        const gfx::Point& offset,
                                        const gfx::Rect& rect) {
   return false;
 }
 
+bool GLImageIOSurface::CopySubImageData(unsigned texture_id,
+                                        const gfx::Point& offset,
+                                        const gfx::Rect& rect,
+                                        GLFence* in_fence,
+                                        GLFence* out_fence) {
+  return false;
+}
+
 bool GLImageIOSurface::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                                             int z_order,
                                             gfx::OverlayTransform transform,
                                             const gfx::Rect& bounds_rect,
                                             const gfx::RectF& crop_rect) {
   NOTREACHED();
   return false;
 }
 
 void GLImageIOSurface::OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
@@ skipping 43 matching lines @@
 }
 
 // static
 GLImageIOSurface* GLImageIOSurface::FromGLImage(GLImage* image) {
   if (!image || image->GetType() != Type::IOSURFACE)
     return nullptr;
   return static_cast<GLImageIOSurface*>(image);
 }
 
 }  // namespace gl