ui: Revert gfx::BufferUsage::SCANOUT to gfx::BufferUsage::GPU_READ_WRITE change.

content/common/gpu/gpu_memory_buffer_factory_surface_texture.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 "content/common/gpu/gpu_memory_buffer_factory_surface_texture.h"
 
 #include "content/common/android/surface_texture_manager.h"
 #include "ui/gl/android/surface_texture.h"
 #include "ui/gl/gl_image_surface_texture.h"
 
 namespace content {
 
 GpuMemoryBufferFactorySurfaceTexture::GpuMemoryBufferFactorySurfaceTexture() {
 }
 
 GpuMemoryBufferFactorySurfaceTexture::~GpuMemoryBufferFactorySurfaceTexture() {
 }
 
 // static
 bool GpuMemoryBufferFactorySurfaceTexture::
     IsGpuMemoryBufferConfigurationSupported(gfx::BufferFormat format,
                                             gfx::BufferUsage usage) {
   switch (usage) {
     case gfx::BufferUsage::GPU_READ:
-    case gfx::BufferUsage::GPU_READ_WRITE:
+    case gfx::BufferUsage::SCANOUT:
     case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
       return false;
     case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
       return format == gfx::BufferFormat::RGBA_8888;
   }
   NOTREACHED();
   return false;
 }
 
 gfx::GpuMemoryBufferHandle
@@ skipping 79 matching lines @@
 
   scoped_refptr<gl::GLImageSurfaceTexture> image(
       new gl::GLImageSurfaceTexture(size));
   if (!image->Initialize(it->second.get()))
     return scoped_refptr<gl::GLImage>();
 
   return image;
 }
 
 }  // namespace content