Add tests to make sure gpu blacklist actually block gpu features.

content/browser/gpu/gpu_process_host.cc

 // Copyright (c) 2011 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_process_host.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
@@ skipping 449 matching lines @@
 
 bool GpuProcessHost::CanShutdown() {
   return true;
 }
 
 void GpuProcessHost::OnProcessLaunched() {
   // Send the GPU process handle to the UI thread before it has to
   // respond to any requests to establish a GPU channel. The response
   // to such requests require that the GPU process handle be known.
 
+  TRACE_EVENT0("test_gpu", "GpuProcessLaunched");
+
   base::ProcessHandle child_handle = in_process_ ?
       base::GetCurrentProcessHandle() : handle();
 
 #if defined(OS_WIN)
   DuplicateHandle(base::GetCurrentProcessHandle(),
                   child_handle,
                   base::GetCurrentProcessHandle(),
                   &gpu_process_,
                   PROCESS_DUP_HANDLE,
                   FALSE,
@@ skipping 132 matching lines @@
   scoped_ptr<EstablishChannelCallback> wrapped_callback(callback);
   wrapped_callback->Run(channel_handle, renderer_process_for_gpu, gpu_info);
 }
 
 void GpuProcessHost::CreateCommandBufferError(
     CreateCommandBufferCallback* callback, int32 route_id) {
   scoped_ptr<GpuProcessHost::CreateCommandBufferCallback>
     wrapped_callback(callback);
   callback->Run(route_id);
 }