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

content/browser/gpu/gpu_internals_ui.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 "content/browser/gpu/gpu_internals_ui.h"
 
 #if defined(OS_LINUX) && defined(USE_X11)
 #include <X11/Xlib.h>
 #endif
 
@@ skipping 254 matching lines @@
       return "UYVY_422";
   }
   NOTREACHED();
   return nullptr;
 }
 
 const char* BufferUsageToString(gfx::BufferUsage usage) {
   switch (usage) {
     case gfx::BufferUsage::GPU_READ:
       return "GPU_READ";
-    case gfx::BufferUsage::GPU_READ_WRITE:
-      return "GPU_READ_WRITE";
+    case gfx::BufferUsage::SCANOUT:
+      return "SCANOUT";
     case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
       return "GPU_READ_CPU_READ_WRITE";
     case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
       return "GPU_READ_CPU_READ_WRITE_PERSISTENT";
   }
   NOTREACHED();
   return nullptr;
 }
 
 base::DictionaryValue* GpuMemoryBufferInfoAsDictionaryValue() {
@@ skipping 233 matching lines @@
     : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new GpuMessageHandler());
 
   // Set up the chrome://gpu/ source.
   BrowserContext* browser_context =
       web_ui->GetWebContents()->GetBrowserContext();
   WebUIDataSource::Add(browser_context, CreateGpuHTMLSource());
 }
 
 }  // namespace content