Cleanup: Convert ASCIIToUTF16("") to string16().

chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller_unittest.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_nsobject.h"
+#include "base/string16.h"
 #include "base/utf_string_conversions.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller.h"
 #include "chrome/browser/ui/cocoa/browser_window_controller.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
 #include "content/public/browser/notification_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 
@@ skipping 166 matching lines @@
 TEST_F(BookmarkBubbleControllerTest, TestFolderWithBlankName) {
   // Create some folders, including a nested folder
   BookmarkModel* model = GetBookmarkModel();
   EXPECT_TRUE(model);
   const BookmarkNode* bookmarkBarNode = model->bookmark_bar_node();
   EXPECT_TRUE(bookmarkBarNode);
   const BookmarkNode* node1 = model->AddFolder(bookmarkBarNode, 0,
                                                ASCIIToUTF16("one"));
   EXPECT_TRUE(node1);
   const BookmarkNode* node2 = model->AddFolder(bookmarkBarNode, 1,
-                                               ASCIIToUTF16(""));
+                                               string16());
   EXPECT_TRUE(node2);
   const BookmarkNode* node3 = model->AddFolder(bookmarkBarNode, 2,
                                                ASCIIToUTF16("three"));
   EXPECT_TRUE(node3);
   const BookmarkNode* node2_1 = model->AddURL(node2, 0, ASCIIToUTF16("title1"),
                                               GURL("http://www.google.com"));
   EXPECT_TRUE(node2_1);
 
   BookmarkBubbleController* controller = ControllerForNode(node1);
   EXPECT_TRUE(controller);
@@ skipping 283 matching lines @@
 // Normally this would be sent up the responder tree correctly, but since
 // tests run in the background, key window and main window are never set on
 // NSApplication. Adding it to NSApplication directly removes the need for
 // worrying about what the current window with focus is.
 - (void)editBookmarkNode:(id)sender {
   EXPECT_TRUE([sender respondsToSelector:@selector(node)]);
   BookmarkBubbleControllerTest::edits_++;
 }
 
 @end