Compute GpuDriverBugWorkarounds only one time in the GPU process

content/gpu/gpu_child_thread.h

Index: content/gpu/gpu_child_thread.h
diff --git a/content/gpu/gpu_child_thread.h b/content/gpu/gpu_child_thread.h
index e5f518972faf543c123e61f551858ef3594f9e97..e902a9d0cf82cc2510f1e940aa1e6fe3802f4241 100644
--- a/content/gpu/gpu_child_thread.h
+++ b/content/gpu/gpu_child_thread.h
@@ -24,6 +24,7 @@
 #include "content/common/gpu/x_util.h"
 #include "content/common/process_control.mojom.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
+#include "gpu/config/gpu_driver_bug_workarounds.h"
 #include "gpu/config/gpu_info.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
@@ -144,6 +145,7 @@ class GpuChildThread : public ChildThreadImpl,
       mojo::InterfaceRequest<mojom::ProcessControl> request);
 
   gpu::GpuPreferences gpu_preferences_;
+  gpu::GpuDriverBugWorkarounds gpu_driver_bug_workarounds_;
 
   // Set this flag to true if a fatal error occurred before we receive the
   // OnInitialize message, in which case we just declare ourselves DOA.