Remove GpuInfo::can_lose_context.

gpu/config/gpu_info_collector_mac.mm

 // 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.
 
 #include "gpu/config/gpu_info_collector.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 151 matching lines @@
   return kCollectInfoSuccess;
 }
 
 }  // namespace anonymous
 
 CollectInfoResult CollectContextGraphicsInfo(GPUInfo* gpu_info) {
   DCHECK(gpu_info);
 
   TRACE_EVENT0("gpu", "gpu_info_collector::CollectGraphicsInfo");
 
-  gpu_info->can_lose_context =
-      (gl::GetGLImplementation() == gl::kGLImplementationEGLGLES2);
   CollectInfoResult result = CollectGraphicsInfoGL(gpu_info);
   gpu_info->context_info_state = result;
   return result;
 }
 
 CollectInfoResult CollectGpuID(uint32_t* vendor_id, uint32_t* device_id) {
   DCHECK(vendor_id && device_id);
 
   GPUInfo::GPUDevice gpu = GetActiveGPU();
   *vendor_id = gpu.vendor_id;
@@ skipping 32 matching lines @@
   gpu_info->driver_version = gpu_info->gl_version.substr(pos + 1);
   return kCollectInfoSuccess;
 }
 
 void MergeGPUInfo(GPUInfo* basic_gpu_info,
                   const GPUInfo& context_gpu_info) {
   MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
 }
 
 }  // namespace gpu