Add win8.1 support to GPUBotConfig

gpu/config/gpu_info_collector_win.cc

Index: gpu/config/gpu_info_collector_win.cc
diff --git a/gpu/config/gpu_info_collector_win.cc b/gpu/config/gpu_info_collector_win.cc
index 73d5423aaddd77e4fbf52d5a087b79d586c9309a..556842c3e8ec1a49977fa5fd791f9fd36b676843 100644
--- a/gpu/config/gpu_info_collector_win.cc
+++ b/gpu/config/gpu_info_collector_win.cc
@@ -545,7 +545,8 @@ GpuIDResult CollectGpuID(uint32* vendor_id, uint32* device_id) {
     base::HexStringToInt(base::UTF16ToASCII(device_string), &device);
     *vendor_id = vendor;
     *device_id = device;
-    return kGpuIDSuccess;
+    if (*vendor_id != 0 && *device_id != 0)
+      return kGpuIDSuccess;
   }
   return kGpuIDFailure;
 }