Added labels under the windows in OverviewMode displaying their current name.

ash/wm/overview/window_selector_item.h

Index: ash/wm/overview/window_selector_item.h
diff --git a/ash/wm/overview/window_selector_item.h b/ash/wm/overview/window_selector_item.h
index eedf3e1f9153c56f33d0073018cb147bbf2e091a..4fbd9c03c3f34c1efcac0c6f9b6e00f346f07464 100644
--- a/ash/wm/overview/window_selector_item.h
+++ b/ash/wm/overview/window_selector_item.h
@@ -6,12 +6,18 @@
 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 
 #include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string16.h"
 #include "ui/gfx/rect.h"
 
 namespace aura {
 class Window;
 }
 
+namespace views {
+class Widget;
+}
+
 namespace ash {
 
 // This class represents an item in overview mode. An item can have one or more
@@ -38,7 +44,7 @@ class WindowSelectorItem {
   virtual void RestoreWindowOnExit(aura::Window* window) = 0;
 
   // Returns the |window| to activate on selecting of this item.
-  virtual aura::Window* SelectionWindow() = 0;
+  virtual aura::Window* SelectionWindow() const = 0;

[flackr, 2014/04/16 02:37:10]

I think in general const functions should return const objects. You can make a
second SelectionWindow method which returns a const aura::Window* similar to
Window::GetRootWindow():
https://code.google.com/p/chromium/codesearch#chromium/src/ui/aura/window.cc&...

[Nina, 2014/04/16 18:19:12]

Done.

 
   // Removes |window| from this item. Check empty() after calling this to see
   // if the entire item is now empty.
@@ -74,6 +80,9 @@ class WindowSelectorItem {
   // Sets the bounds used by the selector item's windows.
   void set_bounds(const gfx::Rect& bounds) { bounds_ = bounds; }
 
+  // Creates a label to display under the window selector item.
+  void UpdateWindowLabels(const gfx::Rect& target_bounds);
+
  private:
   // The root window this item is being displayed on.
   aura::Window* root_window_;
@@ -90,6 +99,9 @@ class WindowSelectorItem {
   // a window layer for display on another monitor.
   bool in_bounds_update_;
 
+  // Label under the window displaying its active tab name.
+  scoped_ptr<views::Widget> window_label_;
+
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };