Update the window labels if they change in overview mode.

ash/wm/overview/window_selector_item.cc

 // Copyright 2013 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/overview/window_selector_item.h"
 
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/overview/scoped_transform_overview_window.h"
@@ skipping 101 matching lines @@
 }
 
 WindowSelectorItem::~WindowSelectorItem() {
 }
 
 void WindowSelectorItem::RemoveWindow(const aura::Window* window) {
   // If empty WindowSelectorItem will be destroyed immediately after this by
   // its owner.
   if (empty())
     return;
+
   window_label_.reset();
   UpdateWindowLabels(target_bounds_, root_window_, false);
   UpdateCloseButtonBounds(root_window_, false);
 }
 
 void WindowSelectorItem::SetBounds(aura::Window* root_window,
                                    const gfx::Rect& target_bounds,
                                    bool animate) {
   if (in_bounds_update_)
     return;
   base::AutoReset<bool> auto_reset_in_bounds_update(&in_bounds_update_, true);
   root_window_ = root_window;
   target_bounds_ = target_bounds;
 
   // Set the bounds of the transparent window handler to cover the entire
   // bounding box area.
   if (!activate_window_button_) {
     activate_window_button_.reset(
         new TransparentActivateWindowButton(SelectionWindow()));
   }
   activate_window_button_->SetBounds(target_bounds);
 
-  // TODO(nsatragno): Handle window title updates.
   UpdateWindowLabels(target_bounds, root_window, animate);
 
   gfx::Rect inset_bounds(target_bounds);
   inset_bounds.Inset(kWindowMargin, kWindowMargin);
   SetItemBounds(root_window, inset_bounds, animate);
   UpdateCloseButtonBounds(root_window, animate);
 }
 
 void WindowSelectorItem::RecomputeWindowTransforms() {
   if (in_bounds_update_ || target_bounds_.IsEmpty())
     return;
   DCHECK(root_window_);
   base::AutoReset<bool> auto_reset_in_bounds_update(&in_bounds_update_, true);
   gfx::Rect inset_bounds(target_bounds_);
   inset_bounds.Inset(kWindowMargin, kWindowMargin);
   SetItemBounds(root_window_, inset_bounds, false);
   UpdateCloseButtonBounds(root_window_, false);
 }
 
 void WindowSelectorItem::SendFocusAlert() const {
   activate_window_button_->SendFocusAlert();
 }
 
 void WindowSelectorItem::ButtonPressed(views::Button* sender,
                                        const ui::Event& event) {
   views::Widget::GetWidgetForNativeView(SelectionWindow())->Close();
 }
 
+void WindowSelectorItem::OnWindowTitleChanged(aura::Window* window,
+                                              const base::string16& new_title) {
+  static_cast<views::Label*>(
+      window_label_->GetContentsView())->SetText(new_title);
+}
+
 void WindowSelectorItem::UpdateCloseButtonBounds(aura::Window* root_window,
                                                  bool animate) {
   gfx::RectF align_bounds(ScreenUtil::ConvertRectFromScreen(
       root_window, SelectionWindow()->layer()->bounds()));
   gfx::Transform window_transform;
   window_transform.Translate(align_bounds.x(), align_bounds.y());
   window_transform.PreconcatTransform(SelectionWindow()->layer()->
                                           GetTargetTransform());
   window_transform.Translate(-align_bounds.x(), -align_bounds.y());
   window_transform.TransformRect(&align_bounds);
@@ skipping 105 matching lines @@
       settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
           ScopedTransformOverviewWindow::kTransitionMilliseconds));
       window_label_->GetNativeWindow()->SetBounds(label_bounds);
     } else {
       window_label_->GetNativeWindow()->SetBounds(label_bounds);
     }
   }
 }
 
 }  // namespace ash