ui: Add sub region copy support to GLImage::CopyTexImage.

content/common/gpu/stream_texture_android.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_COMMON_GPU_STREAM_TEXTURE_ANDROID_H_
 #define CONTENT_COMMON_GPU_STREAM_TEXTURE_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
@@ skipping 20 matching lines @@
                 int32 route_id,
                 uint32 texture_id);
   ~StreamTexture() override;
 
   // gfx::GLImage implementation:
   void Destroy(bool have_context) override;
   gfx::Size GetSize() override;
   unsigned GetInternalFormat() override;
   bool BindTexImage(unsigned target) override;
   void ReleaseTexImage(unsigned target) override;
-  bool CopyTexImage(unsigned target) override;
+  bool CopyTexSubImage(unsigned target,
+                       const gfx::Point& offset,
+                       const gfx::Rect& rect) override;
   void WillUseTexImage() override;
   void DidUseTexImage() override {}
   void WillModifyTexImage() override {}
   void DidModifyTexImage() override {}
   bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                             int z_order,
                             gfx::OverlayTransform transform,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override;
 
@@ skipping 29 matching lines @@
   int32 route_id_;
   bool has_listener_;
 
   base::WeakPtrFactory<StreamTexture> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(StreamTexture);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_STREAM_TEXTURE_ANDROID_H_