wstring: convert all SetPageTitle APIs to use string16

chrome/browser/tab_contents/tab_contents_view_gtk.cc

 // 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.
 
 #include "chrome/browser/tab_contents/tab_contents_view_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
@@ skipping 168 matching lines @@
   // managed for us, so it appears to be only used for the download shelf
   // animation.
   int x = 0;
   int y = 0;
   if (expanded_->window)
     gdk_window_get_origin(expanded_->window, &x, &y);
   out->SetRect(x + expanded_->allocation.x, y + expanded_->allocation.y,
                requested_size_.width(), requested_size_.height());
 }
 
-void TabContentsViewGtk::SetPageTitle(const std::wstring& title) {
+void TabContentsViewGtk::SetPageTitle(const string16& title) {
   // Set the window name to include the page title so it's easier to spot
   // when debugging (e.g. via xwininfo -tree).
   gfx::NativeView content_view = GetContentNativeView();
   if (content_view && content_view->window)
-    gdk_window_set_title(content_view->window, WideToUTF8(title).c_str());
+    gdk_window_set_title(content_view->window, UTF16ToUTF8(title).c_str());
 }
 
 void TabContentsViewGtk::OnTabCrashed(base::TerminationStatus status,
                                       int error_code) {
   if (tab_contents_ != NULL && !sad_tab_.get()) {
     sad_tab_.reset(new SadTabGtk(
         tab_contents_,
         status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED ?
         SadTabGtk::KILLED : SadTabGtk::CRASHED));
     InsertIntoContentArea(sad_tab_->widget());
@@ skipping 290 matching lines @@
   g_value_set_int(&value, child_x);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    widget, "x", &value);
 
   int child_y = std::max((allocation->height - requisition.height) / 2, 0);
   g_value_set_int(&value, child_y);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    widget, "y", &value);
   g_value_unset(&value);
 }