Remove some wstrings in test_shell.

webkit/tools/test_shell/test_shell_gtk.cc

Index: webkit/tools/test_shell/test_shell_gtk.cc
diff --git a/webkit/tools/test_shell/test_shell_gtk.cc b/webkit/tools/test_shell/test_shell_gtk.cc
index de053e8cd65fd090cb9931b3e2ca255758bc8319..f1eeb7901ceb837fc3414c90bcc9deb217040cc2 100644
--- a/webkit/tools/test_shell/test_shell_gtk.cc
+++ b/webkit/tools/test_shell/test_shell_gtk.cc
@@ -489,7 +489,7 @@ void TestShell::ResizeSubViews() {
 }
 
 void TestShell::LoadURLForFrame(const GURL& url,
-                                const std::wstring& frame_name) {
+                                const string16& frame_name) {
   if (!url.is_valid())
     return;
 
@@ -502,7 +502,7 @@ void TestShell::LoadURLForFrame(const GURL& url,
   }
 
   navigation_controller_->LoadEntry(
-      new TestNavigationEntry(-1, url, std::wstring(), frame_name));
+      new TestNavigationEntry(-1, url, frame_name));
 }
 
 bool TestShell::PromptForSaveFile(const wchar_t* prompt_title,