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

content/test/gpu_memory_buffer_factory_test_template.h

 // Copyright 2015 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.
 
 // This file defines tests that implementations of GpuMemoryBufferFactory should
 // pass in order to be conformant.
 
 #ifndef CONTENT_TEST_GPU_MEMORY_BUFFER_FACTORY_TEST_TEMPLATE_H_
 #define CONTENT_TEST_GPU_MEMORY_BUFFER_FACTORY_TEST_TEMPLATE_H_
 
@@ skipping 12 matching lines @@
 TYPED_TEST_CASE_P(GpuMemoryBufferFactoryTest);
 
 TYPED_TEST_P(GpuMemoryBufferFactoryTest, CreateGpuMemoryBuffer) {
   const gfx::GpuMemoryBufferId kBufferId(1);
   const int kClientId = 1;
 
   gfx::Size buffer_size(2, 2);
 
   for (auto format : gfx::GetBufferFormatsForTesting()) {
     gfx::BufferUsage usages[] = {
-        gfx::BufferUsage::GPU_READ, gfx::BufferUsage::GPU_READ_WRITE,
+        gfx::BufferUsage::GPU_READ, gfx::BufferUsage::SCANOUT,
         gfx::BufferUsage::GPU_READ_CPU_READ_WRITE,
         gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT};
     for (auto usage : usages) {
       if (!TypeParam::IsGpuMemoryBufferConfigurationSupported(format, usage))
         continue;
 
       gfx::GpuMemoryBufferHandle handle =
           TestFixture::factory_.CreateGpuMemoryBuffer(kBufferId, buffer_size,
                                                       format, usage, kClientId,
                                                       gfx::kNullPluginWindow);
@@ skipping 45 matching lines @@
 }
 
 // The GpuMemoryBufferFactoryImportTest test case verifies that the
 // GpuMemoryBufferFactory implementation handles import of buffers correctly.
 REGISTER_TYPED_TEST_CASE_P(GpuMemoryBufferFactoryImportTest,
                            CreateGpuMemoryBufferFromHandle);
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_GPU_MEMORY_BUFFER_FACTORY_TEST_TEMPLATE_H_