Clear SingleProcess and InProcessGPU logic.

content/browser/gpu/gpu_process_host.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_process_host.h"
 
 #include "base/base64.h"
 #include "base/base_switches.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 565 matching lines @@
 
 bool GpuProcessHost::Init() {
   init_start_time_ = base::TimeTicks::Now();
 
   TRACE_EVENT_INSTANT0("gpu", "LaunchGpuProcess", TRACE_EVENT_SCOPE_THREAD);
 
   std::string channel_id = process_->GetHost()->CreateChannel();
   if (channel_id.empty())
     return false;
 
-  if (in_process_ && g_gpu_main_thread_factory) {
+  if (in_process_) {
+    CHECK(g_gpu_main_thread_factory);

[piman, 2013/11/07 22:09:52]

Should be DCHECK.

[dshwang, 2013/11/08 10:05:56]

yes. but it will crash in next line.
in_process_gpu_thread_->Start();

     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kDisableGpuWatchdog);
 
     in_process_gpu_thread_.reset(g_gpu_main_thread_factory(channel_id));
     in_process_gpu_thread_->Start();
 
     OnProcessLaunched();  // Fake a callback that the process is ready.
   } else if (!LaunchGpuProcess(channel_id)) {
     return false;
   }
@@ skipping 659 matching lines @@
   TRACE_EVENT0("gpu", "GpuProcessHost::OnCacheShader");
   ClientIdToShaderCacheMap::iterator iter =
       client_id_to_shader_cache_.find(client_id);
   // If the cache doesn't exist then this is an off the record profile.
   if (iter == client_id_to_shader_cache_.end())
     return;
   iter->second->Cache(GetShaderPrefixKey() + ":" + key, shader);
 }
 
 }  // namespace content