Convert string16 to base::string16 in content.

content/browser/geolocation/fake_access_token_store.h

Index: content/browser/geolocation/fake_access_token_store.h
diff --git a/content/browser/geolocation/fake_access_token_store.h b/content/browser/geolocation/fake_access_token_store.h
index 4d0867bf0be74d2a71f1f4fe8b0feebb4d73016c..30a01859d101bf7d1264fbf0fb2d2d91060ba283 100644
--- a/content/browser/geolocation/fake_access_token_store.h
+++ b/content/browser/geolocation/fake_access_token_store.h
@@ -23,12 +23,13 @@ class FakeAccessTokenStore : public AccessTokenStore {
   MOCK_METHOD1(LoadAccessTokens,
                void(const LoadAccessTokensCallbackType& callback));
   MOCK_METHOD2(SaveAccessToken,
-               void(const GURL& server_url, const string16& access_token));
+               void(const GURL& server_url,
+                    const base::string16& access_token));
 
   void DefaultLoadAccessTokens(const LoadAccessTokensCallbackType& callback);
 
   void DefaultSaveAccessToken(const GURL& server_url,
-                              const string16& access_token);
+                              const base::string16& access_token);
 
   AccessTokenSet access_token_set_;
   LoadAccessTokensCallbackType callback_;