Add a user pref in Settings to disable all GPU features.

content/browser/gpu/gpu_data_manager_impl.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_DATA_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 61 matching lines @@
   virtual void SetWindowCount(uint32 count) OVERRIDE;
   virtual uint32 GetWindowCount() const OVERRIDE;
   virtual void UnblockDomainFrom3DAPIs(const GURL& url) OVERRIDE;
   virtual void DisableGpuWatchdog() OVERRIDE;
   virtual void SetGLStrings(const std::string& gl_vendor,
                             const std::string& gl_renderer,
                             const std::string& gl_version) OVERRIDE;
   virtual void GetGLStrings(std::string* gl_vendor,
                             std::string* gl_renderer,
                             std::string* gl_version) OVERRIDE;
+  virtual void DisableHardwareAcceleration() OVERRIDE;
 
   // This collects preliminary GPU info, load GpuBlacklist, and compute the
   // preliminary blacklisted features; it should only be called at browser
   // startup time in UI thread before the IO restriction is turned on.
   void Initialize();
 
   // Only update if the current GPUInfo is not finalized.  If blacklist is
   // loaded, run through blacklist and update blacklisted features.
   void UpdateGpuInfo(const GPUInfo& gpu_info);
 
   void UpdateVideoMemoryUsageStats(
       const GPUVideoMemoryUsageStats& video_memory_usage_stats);
 
   // Insert disable-feature switches corresponding to preliminary gpu feature
   // flags into the renderer process command line.
   void AppendRendererCommandLine(CommandLine* command_line) const;
 
   // Insert switches into gpu process command line: kUseGL,
   // kDisableGLMultisampling.
   void AppendGpuCommandLine(CommandLine* command_line) const;
 
   // Insert switches into plugin process command line:
   // kDisableCoreAnimationPlugins.
   void AppendPluginCommandLine(CommandLine* command_line) const;
 
   GpuSwitchingOption GetGpuSwitchingOption() const;
 
-  // Force the current card to be blacklisted (usually due to GPU process
-  // crashes).
-  void BlacklistCard();
-
   std::string GetBlacklistVersion() const;
 
   // Returns the reasons for the latest run of blacklisting decisions.
   // For the structure of returned value, see documentation for
   // GpuBlacklist::GetBlacklistedReasons().
   // Caller is responsible to release the returned value.
   base::ListValue* GetBlacklistReasons() const;
 
   void AddLogMessage(int level,
                      const std::string& header,
@@ skipping 40 matching lines @@
   typedef std::map<std::string, DomainBlockEntry> DomainBlockMap;
 
   typedef ObserverListThreadSafe<GpuDataManagerObserver>
       GpuDataManagerObserverList;
 
   friend class GpuDataManagerImplTest;
   friend struct DefaultSingletonTraits<GpuDataManagerImpl>;
 
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest, GpuSideBlacklisting);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest, GpuSideExceptions);
-  FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest, BlacklistCard);
+  FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest,
+                           DisableHardwareAcceleration);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest, SoftwareRendering);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest, SoftwareRendering2);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest, GpuInfoUpdate);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest,
                            NoGpuInfoUpdateWithSoftwareRendering);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest,
                            GPUVideoMemoryUsageStatsUpdate);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest,
                            BlockAllDomainsFrom3DAPIs);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplTest,
@@ skipping 78 matching lines @@
   DomainBlockMap blocked_domains_;
   mutable std::list<base::Time> timestamps_of_gpu_resets_;
   bool domain_blocking_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuDataManagerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_