Add bits to indicate which parts of GPUInfo are collected.

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index d05b6d84e51a91132d02a30ccf6d68f403d01ff2..fac874b9081af9092d4a4b691a5cb6aac07ec6ec 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -405,6 +405,9 @@ bool CollectGraphicsInfo(gpu::GPUInfo& gpu_info) {
     case gpu::kCollectInfoNonFatalFailure:
       VLOG(1) << "gpu::CollectGraphicsInfo failed (non-fatal).";
       break;
+    case gpu::kCollectInfoNone:
+      NOTREACHED();
+      break;
     case gpu::kCollectInfoSuccess:
       break;
   }