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

gpu/command_buffer/service/in_process_command_buffer.cc

Index: gpu/command_buffer/service/in_process_command_buffer.cc
diff --git a/gpu/command_buffer/service/in_process_command_buffer.cc b/gpu/command_buffer/service/in_process_command_buffer.cc
index 5401a48cecde9d8367c0e97ef7a29e1a40447cdf..b3b1b12efdc3650d0ccd1b88f4d25d5157cfb7d4 100644
--- a/gpu/command_buffer/service/in_process_command_buffer.cc
+++ b/gpu/command_buffer/service/in_process_command_buffer.cc
@@ -769,7 +769,7 @@ int32 InProcessCommandBuffer::CreateGpuMemoryBufferImage(
       gpu_memory_buffer_manager_->AllocateGpuMemoryBuffer(
           gfx::Size(width, height),
           gpu::ImageFactory::DefaultBufferFormatForImageFormat(internalformat),
-          gfx::BufferUsage::GPU_READ_WRITE));
+          gfx::BufferUsage::SCANOUT));
   if (!buffer)
     return -1;