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 5057da5b0f0ee075fd5ce1fc16b6dbc549de1c49..9916c40eb3a36a9b709c75fea72a02b68ca02eb6 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;
@@ -373,10 +372,6 @@ 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_;