Adding new extension sync integration tests. Also modified the way that profile

chrome/test/live_sync/live_extensions_sync_test.h

Index: chrome/test/live_sync/live_extensions_sync_test.h
diff --git a/chrome/test/live_sync/live_extensions_sync_test.h b/chrome/test/live_sync/live_extensions_sync_test.h
index ce038fa000ea2926ea4b433d38f6b492a6186cfe..9eb7233ceecc8db4d03cea59c0931ab61f42a588 100644
--- a/chrome/test/live_sync/live_extensions_sync_test.h
+++ b/chrome/test/live_sync/live_extensions_sync_test.h
@@ -41,6 +41,18 @@ class LiveExtensionsSyncTest : public LiveSyncTest {
   // Installs all pending synced extensions for |profile|.
   void InstallExtensionsPendingForSync(Profile* profile);
 
+  // Enables the extension for the given index on |profile|.
+  void EnableExtension(Profile* profile, int index);
+
+  // Disables the extension for the given index on |profile|.
+  void DisableExtension(Profile* profile, int index);
+
+  // Enables the extension for the given index in incognito mode on |profile|.
+  void IncognitoEnableExtension(Profile* profile, int index);
+
+  // Disables the extension for the given index in incognito mode on |profile|.
+  void IncognitoDisableExtension(Profile* profile, int index);
+
  private:
   LiveSyncExtensionHelper extension_helper_;