resources: Prevent including the same resource in multiple pack files.

chrome/test/base/javascript_browser_test.cc

Index: chrome/test/base/javascript_browser_test.cc
diff --git a/chrome/test/base/javascript_browser_test.cc b/chrome/test/base/javascript_browser_test.cc
index 466afc1a981407a99f8c99b06cbb435043d885bf..3eeb0e3a80112d76654670e2427531c8060d8377 100644
--- a/chrome/test/base/javascript_browser_test.cc
+++ b/chrome/test/base/javascript_browser_test.cc
@@ -52,11 +52,6 @@ void JavaScriptBrowserTest::SetUpOnMainThread() {
   ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &source_root_directory));
   library_search_paths_.push_back(source_root_directory);
 
-  base::FilePath resources_pack_path;
-  PathService::Get(chrome::FILE_RESOURCES_PACK, &resources_pack_path);
-  ResourceBundle::GetSharedInstance().AddDataPackFromPath(
-      resources_pack_path, ui::SCALE_FACTOR_NONE);
-
   AddLibrary(base::FilePath(kMockJSPath));
   AddLibrary(base::FilePath(kWebUILibraryJS));
 }