Make PnaclTranslationCacheEntry RefCountedThreadSafe

components/nacl/browser/pnacl_translation_cache.cc

Index: components/nacl/browser/pnacl_translation_cache.cc
diff --git a/components/nacl/browser/pnacl_translation_cache.cc b/components/nacl/browser/pnacl_translation_cache.cc
index a183d59651d69fc6015d85bcb3f93a66291456fe..1f71fe39be613ac4d090d7e1b249375cc575e8a4 100644
--- a/components/nacl/browser/pnacl_translation_cache.cc
+++ b/components/nacl/browser/pnacl_translation_cache.cc
@@ -42,7 +42,7 @@ const int kMaxMemCacheSize = 100 * 1024 * 1024;
 // operations. It also tracks the open disk_cache::Entry
 // and ensures that the entry is closed.
 class PnaclTranslationCacheEntry
-    : public base::RefCounted<PnaclTranslationCacheEntry> {
+    : public base::RefCountedThreadSafe<PnaclTranslationCacheEntry> {
  public:
   static PnaclTranslationCacheEntry* GetReadEntry(
       base::WeakPtr<PnaclTranslationCache> cache,
@@ -76,7 +76,7 @@ class PnaclTranslationCacheEntry
   };
 
  private:
-  friend class base::RefCounted<PnaclTranslationCacheEntry>;
+  friend class base::RefCountedThreadSafe<PnaclTranslationCacheEntry>;
   PnaclTranslationCacheEntry(base::WeakPtr<PnaclTranslationCache> cache,
                              const std::string& key,
                              bool is_read);