Make it possible to run WebGL conformance tests on Android

content/gpu/gpu_info_collector_mac.mm

Index: content/gpu/gpu_info_collector_mac.mm
diff --git a/content/gpu/gpu_info_collector_mac.mm b/content/gpu/gpu_info_collector_mac.mm
index b3ded51bcea7d6e9b8d7cf970cf77157ecbd2a83..c1714a865edbe097c1fc40f6afffb9038f571de5 100644
--- a/content/gpu/gpu_info_collector_mac.mm
+++ b/content/gpu/gpu_info_collector_mac.mm
@@ -169,7 +169,7 @@ bool CollectContextGraphicsInfo(content::GPUInfo* gpu_info) {
   return CollectGraphicsInfoGL(gpu_info);
 }
 
-bool CollectGpuID(uint32* vendor_id, uint32* device_id) {
+GpuIDResult CollectGpuID(uint32* vendor_id, uint32* device_id) {
   DCHECK(vendor_id && device_id);
   *vendor_id = 0;
   *device_id = 0;
@@ -178,9 +178,9 @@ bool CollectGpuID(uint32* vendor_id, uint32* device_id) {
   if (CollectPCIVideoCardInfo(&gpu_info)) {
     *vendor_id = gpu_info.gpu.vendor_id;
     *device_id = gpu_info.gpu.device_id;
-    return true;
+    return kGpuIDSuccess;
   }
-  return false;
+  return kGpuIDFailure;
 }
 
 bool CollectBasicGraphicsInfo(content::GPUInfo* gpu_info) {