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

content/test/gpu_memory_buffer_impl_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_IMPL_TEST_TEMPLATE_H_
 #define CONTENT_TEST_GPU_MEMORY_BUFFER_IMPL_TEST_TEMPLATE_H_
 
@@ skipping 28 matching lines @@
   }
 };
 
 TYPED_TEST_CASE_P(GpuMemoryBufferImplTest);
 
 TYPED_TEST_P(GpuMemoryBufferImplTest, CreateFromHandle) {
   const gfx::Size kBufferSize(8, 8);
 
   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::IsConfigurationSupported(format, usage))
         continue;
 
       bool destroyed = false;
       gfx::GpuMemoryBufferHandle handle;
       GpuMemoryBufferImpl::DestructionCallback destroy_callback =
           TestFixture::AllocateGpuMemoryBuffer(kBufferSize, format, usage,
@@ skipping 135 matching lines @@
 // The GpuMemoryBufferImplTest test case verifies behavior that is expected
 // from a GpuMemoryBuffer implementation in order to be conformant.
 REGISTER_TYPED_TEST_CASE_P(GpuMemoryBufferImplTest,
                            CreateFromHandle,
                            Map,
                            PersistentMap);
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_GPU_MEMORY_BUFFER_IMPL_TEST_TEMPLATE_H_