chromeos: Add power supply info reading capability

chrome/browser/chromeos/cros/power_library.cc

Index: chrome/browser/chromeos/cros/power_library.cc
diff --git a/chrome/browser/chromeos/cros/power_library.cc b/chrome/browser/chromeos/cros/power_library.cc
index f091e216334449dac6ea3d4458cbe4c0628d0dab..ca3de978ec461bdffe41f36ba542b0bce0c7b0c0 100644
--- a/chrome/browser/chromeos/cros/power_library.cc
+++ b/chrome/browser/chromeos/cros/power_library.cc
@@ -11,8 +11,6 @@
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/observer_list.h"
-#include "base/time.h"
-#include "base/timer.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/cros/chromeos_power.h"
@@ -25,15 +23,10 @@ namespace chromeos {
 class PowerLibraryImpl : public PowerLibrary {
  public:
   PowerLibraryImpl()
-      : power_status_connection_(NULL),
-        resume_status_connection_(NULL) {
+      : resume_status_connection_(NULL) {
   }
 
   virtual ~PowerLibraryImpl() {
-    if (power_status_connection_) {
-      chromeos::DisconnectPowerStatus(power_status_connection_);
-      power_status_connection_ = NULL;
-    }
     if (resume_status_connection_) {
       chromeos::DisconnectResume(resume_status_connection_);
       resume_status_connection_ = NULL;
@@ -43,8 +36,6 @@ class PowerLibraryImpl : public PowerLibrary {
   // Begin PowerLibrary implementation.
   virtual void Init() OVERRIDE {
     DCHECK(CrosLibrary::Get()->libcros_loaded());
-    power_status_connection_ =
-        chromeos::MonitorPowerStatus(&PowerStatusChangedHandler, this);
     resume_status_connection_ =
         chromeos::MonitorResume(&SystemResumedHandler, this);
   }
@@ -82,12 +73,6 @@ class PowerLibraryImpl : public PowerLibrary {
     chromeos::RequestShutdown();
   }
 
-  virtual void RequestStatusUpdate() OVERRIDE {
-    // TODO(stevenjb): chromeos::RetrievePowerInformation has been deprecated;
-    // we should add a mechanism to immediately request an update, probably
-    // when we migrate the DBus code from libcros to here.
-  }
-
   // End PowerLibrary implementation.
 
  private:
@@ -110,40 +95,11 @@ class PowerLibraryImpl : public PowerLibrary {
     delete notify;
   }
 
-  static void PowerStatusChangedHandler(
-      void* object, const chromeos::PowerStatus& power_status) {
-    // TODO(sque): this is a temporary copy-over from libcros.  Soon libcros
-    // will be removed and this will not be necessary.
-    PowerSupplyStatus status;
-    status.line_power_on         = power_status.line_power_on;
-    status.battery_is_present    = power_status.battery_is_present;
-    status.battery_is_full       =
-        (power_status.battery_state == chromeos::BATTERY_STATE_FULLY_CHARGED);
-    status.battery_seconds_to_empty = power_status.battery_time_to_empty;
-    status.battery_seconds_to_full  = power_status.battery_time_to_full;
-    status.battery_percentage    = power_status.battery_percentage;
-
-    PowerLibraryImpl* power = static_cast<PowerLibraryImpl*>(object);
-    power->UpdatePowerStatus(status);
-  }
-
   static void SystemResumedHandler(void* object) {
     PowerLibraryImpl* power = static_cast<PowerLibraryImpl*>(object);
     power->SystemResumed();
   }
 
-  void UpdatePowerStatus(const PowerSupplyStatus& status) {
-    // Called from PowerStatusChangedHandler, a libcros callback which
-    // should always run on UI thread.
-    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-    DVLOG(1) << "Power line_power_on = " << status.line_power_on
-             << " percentage = " << status.battery_percentage
-             << " seconds_to_empty = " << status.battery_seconds_to_empty
-             << " seconds_to_full = " << status.battery_seconds_to_full;
-    FOR_EACH_OBSERVER(Observer, observers_, PowerChanged(status));
-  }
-
   void SystemResumed() {
     // Called from SystemResumedHandler, a libcros callback which should
     // always run on UI thread.
@@ -153,10 +109,6 @@ class PowerLibraryImpl : public PowerLibrary {
 
   ObserverList<Observer> observers_;
 
-  // A reference to the power battery API, to allow callbacks when the battery
-  // status changes.
-  chromeos::PowerStatusConnection power_status_connection_;
-
   // A reference to the resume alerts.
   chromeos::ResumeConnection resume_status_connection_;
 
@@ -167,10 +119,7 @@ class PowerLibraryImpl : public PowerLibrary {
 // fully charged and fully depleted states.
 class PowerLibraryStubImpl : public PowerLibrary {
  public:
-  PowerLibraryStubImpl()
-      : discharging_(true),
-        battery_percentage_(80),
-        pause_count_(0) {
+  PowerLibraryStubImpl() {
   }
 
   virtual ~PowerLibraryStubImpl() {}
@@ -196,56 +145,9 @@ class PowerLibraryStubImpl : public PowerLibrary {
 
   virtual void RequestShutdown() OVERRIDE {}
 
-  virtual void RequestStatusUpdate() OVERRIDE {
-    if (!timer_.IsRunning()) {
-      timer_.Start(
-          FROM_HERE,
-          base::TimeDelta::FromMilliseconds(100),
-          this,
-          &PowerLibraryStubImpl::Update);
-    } else {
-      timer_.Stop();
-    }
-  }
-
   // End PowerLibrary implementation.
-
  private:
-  void Update() {
-    // We pause at 0 and 100% so that it's easier to check those conditions.
-    if (pause_count_ > 1) {
-      pause_count_--;
-      return;
-    }
-
-    if (battery_percentage_ == 0 || battery_percentage_ == 100) {
-      if (pause_count_) {
-        pause_count_ = 0;
-        discharging_ = !discharging_;
-      } else {
-        pause_count_ = 20;
-        return;
-      }
-    }
-    battery_percentage_ += (discharging_ ? -1 : 1);
-
-    PowerSupplyStatus status;
-    status.line_power_on = !discharging_;
-    status.battery_is_present = true;
-    status.battery_percentage = battery_percentage_;
-    status.battery_seconds_to_empty =
-        std::max(1, battery_percentage_ * 180 / 100);
-    status.battery_seconds_to_full =
-        std::max(static_cast<int64>(1), 180 - status.battery_seconds_to_empty);
-
-    FOR_EACH_OBSERVER(Observer, observers_, PowerChanged(status));
-  }
-
-  bool discharging_;
-  int battery_percentage_;
-  int pause_count_;
   ObserverList<Observer> observers_;
-  base::RepeatingTimer<PowerLibraryStubImpl> timer_;
 };
 
 // static