Move [Get|Set]WebStoreLogin methods from ExtensionPrefs to WebstorePrivateAPI

chrome/browser/extensions/extension_prefs.h

Index: chrome/browser/extensions/extension_prefs.h
diff --git a/chrome/browser/extensions/extension_prefs.h b/chrome/browser/extensions/extension_prefs.h
index 68870da40eca396e0bd6459c3f1293bf1a0507dd..a06a1183f9d5634b273b81cf3f7e0eb1524102b3 100644
--- a/chrome/browser/extensions/extension_prefs.h
+++ b/chrome/browser/extensions/extension_prefs.h
@@ -421,14 +421,6 @@ class ExtensionPrefs : public ContentSettingsStore::Observer,
   // information.
   scoped_ptr<ExtensionsInfo> GetAllDelayedInstallInfo() const;
 
-  // We allow the web store to set a string containing login information when a
-  // purchase is made, so that when a user logs into sync with a different
-  // account we can recognize the situation. The Get function returns true if
-  // there was previously stored data (placing it in |result|), or false
-  // otherwise. The Set will overwrite any previous login.
-  bool GetWebStoreLogin(std::string* result);
-  void SetWebStoreLogin(const std::string& login);
-
   // Returns true if the user repositioned the app on the app launcher via drag
   // and drop.
   bool WasAppDraggedByUser(const std::string& extension_id);