base::RefCounted now DCHECKs when referenced from multiple threads.

gpu/config/gpu_control_list.h

Index: gpu/config/gpu_control_list.h
diff --git a/gpu/config/gpu_control_list.h b/gpu/config/gpu_control_list.h
index a5abf5236347bf0b6210c702265e4c427dd6103d..bd868eaa68999fc3f788f71714e0eba72cad53b4 100644
--- a/gpu/config/gpu_control_list.h
+++ b/gpu/config/gpu_control_list.h
@@ -244,8 +244,9 @@ class GPU_EXPORT GpuControlList {
 
   typedef base::hash_map<std::string, int> FeatureMap;
 
+  // TODO(mgiuca): Avoid using UnsafeRefCounted. http://crbug.com/469952.
   class GPU_EXPORT GpuControlListEntry
-      : public base::RefCounted<GpuControlListEntry> {
+      : public base::UnsafeRefCounted<GpuControlListEntry> {
    public:
     // Constructs GpuControlListEntry from DictionaryValue loaded from json.
     // Top-level entry must have an id number.  Others are exceptions.
@@ -293,7 +294,7 @@ class GPU_EXPORT GpuControlList {
                          bool supports_feature_type_all) const;
 
    private:
-    friend class base::RefCounted<GpuControlListEntry>;
+    friend class base::UnsafeRefCounted<GpuControlListEntry>;
 
     enum MultiGpuStyle {
       kMultiGpuStyleOptimus,