Implemented multisampling control in software rendering list. Move prelimina...

chrome/common/gpu_feature_flags.h

 // Copyright (c) 2010 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 CHROME_COMMON_GPU_FEATURE_FLAGS_H__
 #define CHROME_COMMON_GPU_FEATURE_FLAGS_H__
 #pragma once
 
 // Provides flags indicating which gpu features are blacklisted for the system
 // on which chrome is currently running.
 
 #include <string>
 
 #include "base/basictypes.h"
 
 class GpuFeatureFlags {
  public:
   enum GpuFeatureType {
     kGpuFeatureAccelerated2dCanvas = 1 << 0,
     kGpuFeatureAcceleratedCompositing = 1 << 1,
     kGpuFeatureWebgl = 1 << 2,
+    kGpuFeatureMultisampling = 1 << 3,
     kGpuFeatureAll = kGpuFeatureAccelerated2dCanvas |
                      kGpuFeatureAcceleratedCompositing |
-                     kGpuFeatureWebgl,
+                     kGpuFeatureWebgl |
+                     kGpuFeatureMultisampling,
     kGpuFeatureUnknown = 0
   };
 
   // All flags initialized to false, i.e., no feature is blacklisted.
   GpuFeatureFlags();
 
   // flags are OR combination of GpuFeatureType.
   void set_flags(uint32 flags);
 
   uint32 flags() const;
 
   // Resets each flag by OR with the corresponding flag in "other".
   void Combine(const GpuFeatureFlags& other);
 
   // Maps string to GpuFeatureType; returns kGpuFeatureUnknown if none of the
   // following is input (case-sensitive):
   //   "accelerated_2d_canvas"
   //   "accelerated_compositing"
   //   "webgl"
+  //   "multisampling"
   static GpuFeatureType StringToGpuFeatureType(
       const std::string& feature_string);
 
  private:
   static const char kGpuFeatureNameAccelerated2dCanvas[];
   static const char kGpuFeatureNameAcceleratedCompositing[];
   static const char kGpuFeatureNameWebgl[];
+  static const char kGpuFeatureNameMultisampling[];
   static const char kGpuFeatureNameAll[];
 
   // If a bit is set to 1, corresponding feature is blacklisted.
   uint32 flags_;
 };
 
 #endif  // CHROME_COMMON_GPU_FEATURE_FLAGS_H__