Get rid of gpu related switches by passing gpu::GpuPreferences via IPC.

content/gpu/in_process_gpu_thread.cc

Index: content/gpu/in_process_gpu_thread.cc
diff --git a/content/gpu/in_process_gpu_thread.cc b/content/gpu/in_process_gpu_thread.cc
index 1453ff2ab9ea9cbb9c84b7c74a0f79e5dd43551a..8f170c3940de2a23083a43bb1334ae561938b3d1 100644
--- a/content/gpu/in_process_gpu_thread.cc
+++ b/content/gpu/in_process_gpu_thread.cc
@@ -74,9 +74,10 @@ void InProcessGpuThread::CleanUp() {
 }
 
 base::Thread* CreateInProcessGpuThread(
-    const InProcessChildThreadParams& params) {
+    const InProcessChildThreadParams& params,
+    const gpu::GpuPreferences& gpu_preferences) {
   return new InProcessGpuThread(
-      params, GpuChildThread::GetGpuPreferencesFromCommandLine(), nullptr);
+      params, gpu_preferences, nullptr);
 }
 
 }  // namespace content