Remove some stray blink::WebGraphicsContext3D references from ui/

ui/aura/bench/bench_main.cc

 // Copyright (c) 2012 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 "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 24 matching lines @@
 #include "third_party/khronos/GLES2/gl2ext.h"
 
 #if defined(USE_X11)
 #include "base/message_loop/message_pump_x11.h"
 #endif
 
 using base::TimeTicks;
 using ui::Compositor;
 using ui::Layer;
 using ui::LayerDelegate;
-using blink::WebGraphicsContext3D;
 
 namespace {
 
 class ColoredLayer : public Layer, public LayerDelegate {
  public:
   explicit ColoredLayer(SkColor color)
       : Layer(ui::LAYER_TEXTURED),
         color_(color),
         draw_(true) {
     set_delegate(this);
@@ skipping 296 matching lines @@
   ui::PrintLayerHierarchy(root_window->window()->layer(), gfx::Point(100, 100));
 #endif
 
   root_window->host()->Show();
   base::MessageLoopForUI::current()->Run();
   focus_client.reset();
   root_window.reset();
 
   return 0;
 }