Added tooltips to stats bar items.

chrome/browser/chromeos/status/power_menu_button.h

Index: chrome/browser/chromeos/status/power_menu_button.h
diff --git a/chrome/browser/chromeos/status/power_menu_button.h b/chrome/browser/chromeos/status/power_menu_button.h
index 7cc55209db1f81298b2275d83b6132d39ecc96dc..abf758acb995d5d8f28fd26f80ca4dde29f04f61 100644
--- a/chrome/browser/chromeos/status/power_menu_button.h
+++ b/chrome/browser/chromeos/status/power_menu_button.h
@@ -12,6 +12,10 @@
 #include "views/controls/menu/menu_2.h"
 #include "views/controls/menu/view_menu_delegate.h"
 
+namespace base {
+class TimeDelta;
+}
+
 class SkBitmap;
 
 namespace chromeos {
@@ -64,8 +68,8 @@ class PowerMenuButton : public StatusAreaButton,
   // This method will draw the |icon| in the appropriate place on the |canvas|.
   void DrawPowerIcon(gfx::Canvas* canvas, SkBitmap icon);
 
-  // Update the power icon depending on the power status.
-  void UpdateIcon();
+  // Update the power icon and menu label info depending on the power status.
+  void UpdateIconAndLabelInfo();
 
   // The number of power images.
   static const int kNumPowerImages;
@@ -73,6 +77,14 @@ class PowerMenuButton : public StatusAreaButton,
   // The power menu.
   views::Menu2 power_menu_;
 
+  // Stored data gathered CrosLibrary::PowerLibrary.
+  bool battery_is_present_;
+  bool line_power_on_;
+  bool battery_fully_charged_;
+  double battery_percentage_;
+  base::TimeDelta battery_time_to_full_;
+  base::TimeDelta battery_time_to_empty_;
+
   // The currently showing icon bitmap id.
   int icon_id_;