Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/command_buffer/service/gpu_preferences.cc

Index: gpu/command_buffer/service/gpu_preferences.cc
diff --git a/cc/proto/vector2d.proto b/gpu/command_buffer/service/gpu_preferences.cc
similarity index 50%
copy from cc/proto/vector2d.proto
copy to gpu/command_buffer/service/gpu_preferences.cc
index 15171844ffc443d28cae7c70e2149ac3989200ab..753e56c2669e130072d81fed1c978d0eec0af4ba 100644
--- a/cc/proto/vector2d.proto
+++ b/gpu/command_buffer/service/gpu_preferences.cc
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-syntax = "proto2";
+#include "gpu/command_buffer/service/gpu_preferences.h"
 
-option optimize_for = LITE_RUNTIME;
+namespace gpu {
 
-package cc.proto;
-
-message Vector2d {
-  optional int64 x = 1;
-  optional int64 y = 2;
+GpuPreferences::GpuPreferences() {
 }
+
+GpuPreferences::~GpuPreferences() {}
+
+}  // namespace gpu