Implement blacklist's force GPU capability in dual GPU machines.

content/browser/gpu/gpu_blacklist.h

 // 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.
 
 #ifndef CONTENT_BROWSER_GPU_GPU_BLACKLIST_H_
 #define CONTENT_BROWSER_GPU_GPU_BLACKLIST_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/public/common/gpu_feature_type.h"
+#include "content/public/common/gpu_switching_option.h"
 
 class Version;
 
 namespace content {
 struct GPUInfo;
 }
 
 class CONTENT_EXPORT GpuBlacklist {
  public:
   enum OsType {
@@ skipping 11 matching lines @@
     // In loading, keep all entries. This is for testing only.
     kAllOs
   };
 
   struct Decision {
     content::GpuFeatureType blacklisted_features;
     content::GpuSwitchingOption gpu_switching;
 
     Decision()
         : blacklisted_features(content::GPU_FEATURE_TYPE_UNKNOWN),
-          gpu_switching(content::GPU_SWITCHING_AUTOMATIC) {
+          gpu_switching(content::GPU_SWITCHING_OPTION_UNKNOWN) {
     }
   };
 
   GpuBlacklist();
   virtual ~GpuBlacklist();
 
   // Loads blacklist information from a json file.
   // If failed, the current GpuBlacklist is un-touched.
   bool LoadGpuBlacklist(const std::string& json_context, OsFilter os_filter);
   bool LoadGpuBlacklist(const std::string& browser_version_string,
@@ skipping 338 matching lines @@
 
   uint32 max_entry_id_;
 
   bool contains_unknown_fields_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuBlacklist);
 };
 
 #endif  // CONTENT_BROWSER_GPU_GPU_BLACKLIST_H_