Add DriverBugWorkaroundsInGpuProcessPage to gpu_process_test.py

gpu/config/gpu_util.cc

Index: gpu/config/gpu_util.cc
diff --git a/gpu/config/gpu_util.cc b/gpu/config/gpu_util.cc
index 80a99fba4e681c87126918fc8c6ed07aabae2755..cffeda799a3b7e712735ce8ae613f42db4e068d9 100644
--- a/gpu/config/gpu_util.cc
+++ b/gpu/config/gpu_util.cc
@@ -60,7 +60,7 @@ void ApplyGpuDriverBugWorkarounds(base::CommandLine* command_line) {
   ApplyGpuDriverBugWorkarounds(gpu_info, command_line);
 }
 
-void ApplyGpuDriverBugWorkarounds(const GPUInfo& gpu_info,
+void ApplyGpuDriverBugWorkarounds(GPUInfo& gpu_info,
                                   base::CommandLine* command_line) {
   scoped_ptr<GpuDriverBugList> list(GpuDriverBugList::Create());
   list->LoadList(kGpuDriverBugListJson,
@@ -73,6 +73,7 @@ void ApplyGpuDriverBugWorkarounds(const GPUInfo& gpu_info,
     command_line->AppendSwitchASCII(switches::kGpuDriverBugWorkarounds,
                                     IntSetToString(workarounds));
   }
+  gpu_info.driver_bugs_workarounds = workarounds;
 }
 
 void StringToFeatureSet(