Support automatic javascript test registry in gtest when creating WebUI tests.

base/path_service.h

Index: base/path_service.h
diff --git a/base/path_service.h b/base/path_service.h
index 284fbf7e9536950c4952ff95603530809ca690b7..80cac2250f8048aa979a20b0a29d92f6cf8ab091 100644
--- a/base/path_service.h
+++ b/base/path_service.h
@@ -55,6 +55,8 @@ class BASE_API PathService {
   static void RegisterProvider(ProviderFunc provider,
                                int key_start,
                                int key_end);
+  // Call to unregister a path provider.
+  static void UnregisterProvider(ProviderFunc provider);
  private:
   static bool GetFromCache(int key, FilePath* path);
   static bool GetFromOverrides(int key, FilePath* path);