webkit: use string16 in webkit_glue.h

webkit/tools/test_shell/test_shell_mac.mm

 // Copyright (c) 2006-2008 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.
 
 #include <ApplicationServices/ApplicationServices.h>
 #import <Cocoa/Cocoa.h>
 #import <objc/objc-runtime.h>
 #include <sys/stat.h>
 
 #include "webkit/tools/test_shell/test_shell.h"
@@ skipping 507 matching lines @@
   NSRect r = [m_mainWnd contentRectForFrameRect:[m_mainWnd frame]];
   r.size.width = width;
   r.size.height = height + URLBAR_HEIGHT;
   [m_mainWnd setFrame:[m_mainWnd frameRectForContentRect:r] display:YES];
 }
 
 void TestShell::ResizeSubViews() {
   // handled by Cocoa for us
 }
 
-/* static */ void TestShell::DumpAllBackForwardLists(std::wstring* result) {
+/* static */ void TestShell::DumpAllBackForwardLists(string16* result) {
   result->clear();
   for (WindowList::iterator iter = TestShell::windowList()->begin();
        iter != TestShell::windowList()->end(); iter++) {
     NSWindow* window = *iter;
     WindowMap::iterator it = window_map_.Get().find(window);
     if (it != window_map_.Get().end())
       it->second->DumpBackForwardList(result);
     else
       LOG(ERROR) << "Failed to find shell for window during dump";
   }
@@ skipping 196 matching lines @@
   return false;
 }
 
 void DidLoadPlugin(const std::string& filename) {
 }
 
 void DidUnloadPlugin(const std::string& filename) {
 }
 
 }  // namespace webkit_glue