content: Add command line flag for native GPU memory buffers.

content/browser/browser_main_loop.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/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 412 matching lines @@
   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
         switches::kRendererProcessLimit);
     size_t process_limit;
     if (base::StringToSizeT(limit_string, &process_limit)) {
       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
     }
   }
 #endif  // !defined(OS_IOS)
 
+  if (parsed_command_line_.HasSwitch(switches::kEnableNativeGpuMemoryBuffers)) {
+    BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
+        gfx::GpuMemoryBuffer::MAP);
+  }
+
+#if defined(USE_OZONE)
+  BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
+      gfx::GpuMemoryBuffer::SCANOUT);
+#endif
+
   if (parts_)
     parts_->PostEarlyInitialization();
 }
 
 void BrowserMainLoop::MainMessageLoopStart() {
   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
   if (parts_) {
     TRACE_EVENT0("startup",
         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
     parts_->PreMainMessageLoopStart();
@@ skipping 750 matching lines @@
 
 void BrowserMainLoop::EndStartupTracing() {
   is_tracing_startup_ = false;
   TracingController::GetInstance()->DisableRecording(
       TracingController::CreateFileSink(
           startup_trace_file_,
           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
 }
 
 }  // namespace content