adds WARP support to Chromium, for Metro mode only, on Windows 8

gpu/config/gpu_info.cc

 // 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.h"
 
 namespace {
 
 void EnumerateGPUDevice(gpu::GPUInfo::Enumerator* enumerator,
                         const gpu::GPUInfo::GPUDevice& device) {
@@ skipping 18 matching lines @@
 
 GPUInfo::GPUDevice::~GPUDevice() { }
 
 GPUInfo::GPUInfo()
     : finalized(false),
       optimus(false),
       amd_switchable(false),
       lenovo_dcute(false),
       adapter_luid(0),
       gl_reset_notification_strategy(0),
+      use_warp(false),
       can_lose_context(false),
       software_rendering(false),
       direct_rendering(true),
       sandboxed(false),
       process_crash_count(0) {
 }
 
 GPUInfo::~GPUInfo() { }
 
 void GPUInfo::EnumerateFields(Enumerator* enumerator) const {
@@ skipping 15 matching lines @@
     std::string machine_model_name;
     std::string machine_model_version;
     std::string gl_version_string;
     std::string gl_vendor;
     std::string gl_renderer;
     std::string gl_extensions;
     std::string gl_ws_vendor;
     std::string gl_ws_version;
     std::string gl_ws_extensions;
     uint32 gl_reset_notification_strategy;
+    bool use_warp;
     bool can_lose_context;
     GpuPerformanceStats performance_stats;
     bool software_rendering;
     bool direct_rendering;
     bool sandboxed;
     int process_crash_count;
 #if defined(OS_WIN)
     DxDiagNode dx_diagnostics;
 #endif
   };
@@ skipping 33 matching lines @@
   enumerator->AddString("glVersion", gl_version);
   enumerator->AddString("glVendor", gl_vendor);
   enumerator->AddString("glRenderer", gl_renderer);
   enumerator->AddString("glExtensions", gl_extensions);
   enumerator->AddString("glWsVendor", gl_ws_vendor);
   enumerator->AddString("glWsVersion", gl_ws_version);
   enumerator->AddString("glWsExtensions", gl_ws_extensions);
   enumerator->AddInt(
       "glResetNotificationStrategy",
       static_cast<int>(gl_reset_notification_strategy));
+  enumerator->AddBool("use_warp", use_warp);
   enumerator->AddBool("can_lose_context", can_lose_context);
   // TODO(kbr): add performance_stats.
   enumerator->AddBool("softwareRendering", software_rendering);
   enumerator->AddBool("directRendering", direct_rendering);
   enumerator->AddBool("sandboxed", sandboxed);
   enumerator->AddInt("processCrashCount", process_crash_count);
   // TODO(kbr): add dx_diagnostics on Windows.
   enumerator->EndAuxAttributes();
 }
 
 }  // namespace gpu