Make gpu black list work again on Linux

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index ef3f392fbef069fd8c93a45c408b51589c59f162..95a6c639bec521a9f8359d63b23766d1a01de514 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1914,6 +1914,14 @@ GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
   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();