Change the scale factor of texture_size from the layer's one to an estimation.

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.h"
@@ skipping 117 matching lines @@
   TimeTicks start_time_;
   int frames_;
   int max_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(BenchCompositorObserver);
 };
 
 class WebGLTexture : public ui::Texture {
  public:
   WebGLTexture(WebGraphicsContext3D* context, const gfx::Size& size)
-      : ui::Texture(false, size),
+      : ui::Texture(false, size, 1.0f),
         context_(context) {
     set_texture_id(context_->createTexture());
     context_->bindTexture(GL_TEXTURE_2D, texture_id());
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     context_->texImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
                          size.width(), size.height(), 0,
                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);
@@ skipping 196 matching lines @@
 
   root_window->ShowRootWindow();
   MessageLoopForUI::current()->Run();
   focus_manager.reset();
   root_window.reset();
 
   ui::CompositorTestSupport::Terminate();
 
   return 0;
 }