Enable sync for the settings from the Extension Settings API.

chrome/test/base/testing_profile.h

Index: chrome/test/base/testing_profile.h
diff --git a/chrome/test/base/testing_profile.h b/chrome/test/base/testing_profile.h
index afbc32e4b6f4128d7a6cea67d60bfeeddaf75006..0a7b50bf20907f7b55801b7a5f9abe356620a8d8 100644
--- a/chrome/test/base/testing_profile.h
+++ b/chrome/test/base/testing_profile.h
@@ -34,7 +34,6 @@ class SpecialStoragePolicy;
 class AutocompleteClassifier;
 class BookmarkModel;
 class CommandLine;
-class ExtensionSettings;
 class ExtensionPrefs;
 class ExtensionPrefStore;
 class ExtensionPrefValueMap;
@@ -377,10 +376,6 @@ class TestingProfile : public Profile {
   // invoked.
   scoped_ptr<ExtensionPrefs> extension_prefs_;
 
-  // The Extension settings. Only created if CreateExtensionService is
-  // invoked.
-  scoped_refptr<ExtensionSettings> extension_settings_;
-
   scoped_ptr<ExtensionService> extension_service_;
 
   scoped_ptr<ExtensionPrefValueMap> extension_pref_value_map_;