Implement an initial extension settings API.

chrome/test/testing_profile.h

Index: chrome/test/testing_profile.h
diff --git a/chrome/test/testing_profile.h b/chrome/test/testing_profile.h
index b461f5e518791a66fbe3ba3e6d9543f7f98820cd..083bb1a11787fd30c4b7e1d695cfdb89cb01a7a2 100644
--- a/chrome/test/testing_profile.h
+++ b/chrome/test/testing_profile.h
@@ -34,6 +34,7 @@ class CommandLine;
 class ExtensionPrefs;
 class ExtensionPrefStore;
 class ExtensionPrefValueMap;
+class ExtensionSettings;
 class ExtensionSpecialStoragePolicy;
 class FaviconService;
 class FindBarState;
@@ -374,6 +375,10 @@ class TestingProfile : public Profile {
   // invoked.
   scoped_ptr<ExtensionPrefs> extension_prefs_;
 
+  // The Extension settings. Only created if CreateExtensionService is
+  // invoked.
+  scoped_ptr<ExtensionSettings> extension_settings_;
+
   scoped_ptr<ExtensionService> extension_service_;
 
   scoped_ptr<ExtensionPrefValueMap> extension_pref_value_map_;