Move GPU preliminary info collection back to UI thread.

content/gpu/gpu_info_collector_linux.cc

Index: content/gpu/gpu_info_collector_linux.cc
===================================================================
--- content/gpu/gpu_info_collector_linux.cc	(revision 111230)
+++ content/gpu/gpu_info_collector_linux.cc	(working copy)
@@ -182,16 +182,8 @@
   }
 
   gpu_info->finalized = true;
-  return CollectGraphicsInfoGL(gpu_info);
-}
+  bool rt = CollectGraphicsInfoGL(gpu_info);
 
-bool CollectPreliminaryGraphicsInfo(content::GPUInfo* gpu_info) {
-  DCHECK(gpu_info);
-
-  bool rt = true;
-  if (!CollectVideoCardInfo(gpu_info))
-    rt = false;
-
   if (gpu_info->vendor_id == 0x1002) {  // ATI
     std::string ati_driver_version = CollectDriverVersionATI();
     if (ati_driver_version != "") {
@@ -203,6 +195,12 @@
   return rt;
 }
 
+bool CollectPreliminaryGraphicsInfo(content::GPUInfo* gpu_info) {
+  DCHECK(gpu_info);
+
+  return CollectVideoCardInfo(gpu_info);
+}
+
 bool CollectVideoCardInfo(content::GPUInfo* gpu_info) {
   DCHECK(gpu_info);