Remove GpuInfo::can_lose_context.

gpu/config/gpu_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_CONFIG_GPU_INFO_H_
 #define GPU_CONFIG_GPU_INFO_H_
 
 // Provides access to the GPU information for the system
 // on which chrome is currently running.
 
@@ skipping 101 matching lines @@
     // In Win/MacOSX, these two strings are not filled at the moment.
     // In Android, these are respectively GL_VENDOR and GL_RENDERER.
     std::string vendor_string;
     std::string device_string;
   };
 
   GPUInfo();
   GPUInfo(const GPUInfo& other);
   ~GPUInfo();
 
-  bool SupportsAccelerated2dCanvas() const {
-    return !can_lose_context && !software_rendering;
-  }
-
   // The amount of time taken to get from the process starting to the message
   // loop being pumped.
   base::TimeDelta initialization_time;
 
   // Computer has NVIDIA Optimus
   bool optimus;
 
   // Computer has AMD Dynamic Switchable Graphics
   bool amd_switchable;
 
@@ skipping 66 matching lines @@
   // GL window system binding version.  "" if not available.
   std::string gl_ws_version;
 
   // GL window system binding extensions.  "" if not available.
   std::string gl_ws_extensions;
 
   // GL reset notification strategy as defined by GL_ARB_robustness. 0 if GPU
   // reset detection or notification not available.
   uint32_t gl_reset_notification_strategy;
 
-  // The device semantics, i.e. whether the Vista and Windows 7 specific
-  // semantics are available.
-  bool can_lose_context;
-
   bool software_rendering;
 
   // Whether the driver uses direct rendering. True on most platforms, false on
   // X11 when using remote X.
   bool direct_rendering;
 
   // Whether the gpu process is running in a sandbox.
   bool sandboxed;
 
   // Number of GPU process crashes recorded.
@@ skipping 61 matching lines @@
     virtual ~Enumerator() {}
   };
 
   // Outputs the fields in this structure to the provided enumerator.
   void EnumerateFields(Enumerator* enumerator) const;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_CONFIG_GPU_INFO_H_