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

gpu/config/gpu_info.cc

Index: gpu/config/gpu_info.cc
diff --git a/gpu/config/gpu_info.cc b/gpu/config/gpu_info.cc
index fd3d8a3fe573f7b5198bab5ddd884d1581c5d5a1..81f72a7262cda770622ce5024c7ec5fae9d32537 100644
--- a/gpu/config/gpu_info.cc
+++ b/gpu/config/gpu_info.cc
@@ -36,6 +36,7 @@ GPUInfo::GPUInfo()
       lenovo_dcute(false),
       adapter_luid(0),
       gl_reset_notification_strategy(0),
+      use_warp(false),
       can_lose_context(false),
       software_rendering(false),
       direct_rendering(true),
@@ -71,6 +72,7 @@ void GPUInfo::EnumerateFields(Enumerator* enumerator) const {
     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;
@@ -124,6 +126,7 @@ void GPUInfo::EnumerateFields(Enumerator* enumerator) const {
   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);