gpu: Add CopyTexImage function to GLImage API.

gpu/command_buffer/service/texture_definition.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 "gpu/command_buffer/service/texture_definition.h"
 
 #include <list>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 16 matching lines @@
 class GLImageSync : public gfx::GLImage {
  public:
   explicit GLImageSync(const scoped_refptr<NativeImageBuffer>& buffer,
                        const gfx::Size& size);
 
   // Implement GLImage.
   virtual void Destroy(bool have_context) OVERRIDE;
   virtual gfx::Size GetSize() OVERRIDE;
   virtual bool BindTexImage(unsigned target) OVERRIDE;
   virtual void ReleaseTexImage(unsigned target) OVERRIDE;
+  virtual bool CopyTexImage(unsigned target) OVERRIDE;
   virtual void WillUseTexImage() OVERRIDE;
   virtual void WillModifyTexImage() OVERRIDE;
   virtual void DidModifyTexImage() OVERRIDE;
   virtual void DidUseTexImage() OVERRIDE;
   virtual bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                                     int z_order,
                                     gfx::OverlayTransform transform,
                                     const gfx::Rect& bounds_rect,
                                     const gfx::RectF& crop_rect) OVERRIDE;
   virtual void SetReleaseAfterUse() OVERRIDE;
@@ skipping 29 matching lines @@
 
 bool GLImageSync::BindTexImage(unsigned target) {
   NOTREACHED();
   return false;
 }
 
 void GLImageSync::ReleaseTexImage(unsigned target) {
   NOTREACHED();
 }
 
+bool GLImageSync::CopyTexImage(unsigned target) {
+  NOTREACHED();

[no sievers, 2014/09/08 17:19:01]

This one is called too since it's used for webgl buffers with android webview.

+  return false;
+}
+
 void GLImageSync::WillUseTexImage() {
   if (buffer_.get())
     buffer_->WillRead(this);
 }
 
 void GLImageSync::DidUseTexImage() {
   if (buffer_.get())
     buffer_->DidRead(this);
 }
 
@@ skipping 391 matching lines @@
 
   // All structural changes should have orphaned the texture.
   if (image_buffer_.get() && !texture->GetLevelImage(texture->target(), 0))
     return false;
 
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu