Make the GPU feature info code more compact.

gpu/command_buffer/service/feature_info.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 GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 
 #include <set>
 #include <string>
 #include "base/containers/hash_tables.h"
@@ skipping 108 matching lines @@
 
  private:
   friend class base::RefCounted<FeatureInfo>;
   friend class BufferManagerClientSideArraysTest;
 
   typedef base::hash_map<GLenum, ValueValidator<GLenum> > ValidatorMap;
   ValidatorMap texture_format_validators_;
 
   ~FeatureInfo();
 
-  void AddExtensionString(const std::string& str);
+  void AddExtensionString(const char* s);
   void InitializeBasicState(const base::CommandLine& command_line);
   void InitializeFeatures();
 
   Validators validators_;
 
   DisallowedFeatures disallowed_features_;
 
   // The extensions string returned by glGetString(GL_EXTENSIONS);
   std::string extensions_;
 
   // Flags for some features
   FeatureFlags feature_flags_;
 
   // Flags for Workarounds.
   Workarounds workarounds_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_