Implement the spring charger replacement UI.

ash/system/chromeos/power/tray_power.h

 // 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.
 
 #ifndef ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
 #define ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
 
 #include "ash/system/chromeos/power/power_status.h"
 #include "ash/system/tray/system_tray_item.h"
 
@@ skipping 40 matching lines @@
   static const int kLowPowerPercentage;
   static const int kNoWarningPercentage;
 
   TrayPower(SystemTray* system_tray,
             message_center::MessageCenter* message_center);
   virtual ~TrayPower();
 
  private:
   friend class TrayPowerTest;
 
+  // This enum is used for histogram. The existing values should not be removed,
+  // and the new values should be added just before CHARGER_TYPE_COUNT.
+  enum ChargerType{
+    UNKNOWN_CHARGER,
+    MAINS_CHARGER,
+    USB_CHARGER,
+    UNCONFIRMED_SPRING_CHARGER,
+    SAFE_SPRING_CHARGER,
+    CHARGER_TYPE_COUNT,
+  };
+
   // Overridden from SystemTrayItem.
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateNotificationView(
       user::LoginStatus status) OVERRIDE;
   virtual void DestroyTrayView() OVERRIDE;
   virtual void DestroyDefaultView() OVERRIDE;
   virtual void DestroyNotificationView() OVERRIDE;
   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
   virtual void UpdateAfterShelfAlignmentChange(
       ShelfAlignment alignment) OVERRIDE;
 
   // Overridden from PowerStatus::Observer.
   virtual void OnPowerStatusChanged() OVERRIDE;
 
   // Show a notification that a low-power USB charger has been connected.
   // Returns true if a notification was shown or explicitly hidden.
   bool MaybeShowUsbChargerNotification();
 
   // Sets |notification_state_|. Returns true if a notification should be shown.
   bool UpdateNotificationState();
   bool UpdateNotificationStateForRemainingTime();
   bool UpdateNotificationStateForRemainingPercentage();
 
+  // Records the charger type in UMA.
+  void RecordChargerType();
+
   message_center::MessageCenter* message_center_;  // Not owned.
   tray::PowerTrayView* power_tray_;
   tray::PowerNotificationView* notification_view_;
   NotificationState notification_state_;
 
   // Was a USB charger connected the last time OnPowerStatusChanged() was
   // called?
   bool usb_charger_was_connected_;
 
+  // Was line power connected the last time onPowerStatusChanged() was called?
+  bool line_power_was_connected_;
+
   DISALLOW_COPY_AND_ASSIGN(TrayPower);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_