Make gpu black list work again on Linux

content/renderer/render_thread_impl.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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 1896 matching lines @@
 GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
   if (!gpu_channel_.get())
     return NULL;
 
   if (gpu_channel_->IsLost())
     return NULL;
 
   return gpu_channel_.get();
 }
 
+bool RenderThreadImpl::HasGpuProcess() {
+  bool hasGpuProcess = false;

[jam, 2016/02/10 18:32:33]

no reason to add this in RenderThreadImpl just for sending an IPC. just send
this IPC in content/renderer/gpu/gpu_benchmarking_extension.cc

+  if (!Send(new GpuHostMsg_HasGpuProcess(&hasGpuProcess)))
+    return false;
+
+  return hasGpuProcess;
+}
+
 #if defined(ENABLE_PLUGINS)
 void RenderThreadImpl::OnPurgePluginListCache(bool reload_pages) {
   EnsureWebKitInitialized();
   // The call below will cause a GetPlugins call with refresh=true, but at this
   // point we already know that the browser has refreshed its list, so disable
   // refresh temporarily to prevent each renderer process causing the list to be
   // regenerated.
   blink_platform_impl_->set_plugin_refresh_allowed(false);
   blink::resetPluginCache(reload_pages);
   blink_platform_impl_->set_plugin_refresh_allowed(true);
@@ skipping 238 matching lines @@
 }
 
 void RenderThreadImpl::PendingRenderFrameConnect::OnConnectionError() {
   size_t erased =
       RenderThreadImpl::current()->pending_render_frame_connects_.erase(
           routing_id_);
   DCHECK_EQ(1u, erased);
 }
 
 }  // namespace content