Handle titlebar text updates properly

ash/wm/panel_frame_view.cc

 // Copyright (c) 2012 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 "ash/wm/frame_painter.h"
 #include "ash/wm/panel_frame_view.h"
 #include "grit/ash_resources.h"
 #include "grit/ui_strings.h"  // Accessibility names
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/base/animation/throb_animation.h"
@@ skipping 35 matching lines @@
 }
 
 void PanelFrameView::ResetWindowControls() {
   NOTIMPLEMENTED();
 }
 
 void PanelFrameView::UpdateWindowIcon() {
   NOTIMPLEMENTED();
 }
 
+void PanelFrameView::UpdateWindowTitle() {
+  NOTIMPLEMENTED();
+}
+
 void PanelFrameView::GetWindowMask(const gfx::Size&, gfx::Path*) {
   // Nothing.
 }
 
 int PanelFrameView::NonClientHitTest(const gfx::Point& point) {
   return frame_painter_->NonClientHitTest(this, point);
 }
 
 void PanelFrameView::OnPaint(gfx::Canvas* canvas) {
   bool paint_as_active = ShouldPaintAsActive();
@@ skipping 20 matching lines @@
       close_button_->bounds().bottom(), client_bounds);
 }
 
 void PanelFrameView::ButtonPressed(views::Button* sender,
                                    const ui::Event& event) {
   if (sender == close_button_)
     GetWidget()->Close();
 }
 
 }  // namespace ash