chromeos: Simplify power supply info in PowerLibrary

chrome/browser/chromeos/cros/power_library.h

Index: chrome/browser/chromeos/cros/power_library.h
diff --git a/chrome/browser/chromeos/cros/power_library.h b/chrome/browser/chromeos/cros/power_library.h
index f29699fe104974a0ff1c51342feb3393ef2d790f..f9daec78f8254243c5d8a4c7c6e7d4854dac8bbc 100644
--- a/chrome/browser/chromeos/cros/power_library.h
+++ b/chrome/browser/chromeos/cros/power_library.h
@@ -15,6 +15,7 @@ class TimeDelta;
 namespace chromeos {
 
 typedef base::Callback<void(int64_t)> CalculateIdleTimeCallback;
+struct PowerStatus;
 
 // This interface defines interaction with the ChromeOS power library APIs.
 // Classes can add themselves as observers. Users can get an instance of this
@@ -23,7 +24,7 @@ class PowerLibrary {
  public:
   class Observer {
    public:
-    virtual void PowerChanged(PowerLibrary* obj) = 0;
+    virtual void PowerChanged(const PowerStatus& status) = 0;
     virtual void SystemResumed() = 0;
 
    protected:
@@ -37,24 +38,6 @@ class PowerLibrary {
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
 
-  // Whether or not the line power is connected.
-  virtual bool IsLinePowerOn() const = 0;
-
-  // Whether or not the battery is fully charged.
-  virtual bool IsBatteryFullyCharged() const = 0;
-
-  // The percentage [0-100] of remaining battery.
-  virtual double GetBatteryPercentage() const = 0;
-
-  // Whether there is a battery present.
-  virtual bool IsBatteryPresent() const = 0;
-
-  // The amount of time until battery is empty.
-  virtual base::TimeDelta GetBatteryTimeToEmpty() const = 0;
-
-  // The amount of time until battery is full.
-  virtual base::TimeDelta GetBatteryTimeToFull() const = 0;
-
   // Calculates idle time asynchronously. If it encounters some error,
   // it returns -1.
   virtual void CalculateIdleTime(CalculateIdleTimeCallback* callback) = 0;