Prevent preliminary blacklisted features from being used too early

content/browser/gpu/gpu_data_manager_impl_private.h

Index: content/browser/gpu/gpu_data_manager_impl_private.h
diff --git a/content/browser/gpu/gpu_data_manager_impl_private.h b/content/browser/gpu/gpu_data_manager_impl_private.h
index 936a6d7d73372877bd326117bdf38d06b4815025..29904338ee60951c678f488a1fe95662201a36fc 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.h
+++ b/content/browser/gpu/gpu_data_manager_impl_private.h
@@ -233,6 +233,8 @@ class CONTENT_EXPORT GpuDataManagerImplPrivate {
 
   std::set<int> blacklisted_features_;
   std::set<int> preliminary_blacklisted_features_;
+  bool preliminary_blacklisted_features_initialized_;
+
   // Eventually |blacklisted_features_| should be folded in to this.
   gpu::GpuFeatureInfo gpu_feature_info_;