#include "content/browser/battery_status/battery_status_manager_win.h"
#include "base/memory/ref_counted.h"
+#include "base/metrics/histogram.h"
#include "base/strings/string16.h"
#include "base/win/message_window.h"
#include "base/win/windows_version.h"
const wchar_t kWindowClassName[] = L"BatteryStatusMessageWindow";
+// This enum is used for histogram. Don't change the order of the existing
+// values.
+enum NumberBatteriesType {
+ UNKNOWN_BATTERIES = 0,
+ NO_BATTERY = 1,
+ ONE_OR_MORE_BATTERIES = 2,
+ BATTERY_TYPES_COUNT = 3,
+};
+
+void UpdateNumberBatteriesHistogram(NumberBatteriesType count) {
+ UMA_HISTOGRAM_ENUMERATION("BatteryStatus.NumberBatteriesWin",
+ count,
+ BATTERY_TYPES_COUNT);
+}
+
+void UpdateNumberBatteriesHistogram() {
+ SYSTEM_POWER_STATUS win_status;
+ if (!GetSystemPowerStatus(&win_status)) {
+ UpdateNumberBatteriesHistogram(UNKNOWN_BATTERIES);
+ return;
+ }
+
+ if (win_status.BatteryFlag == 255)
+ UpdateNumberBatteriesHistogram(UNKNOWN_BATTERIES);
+ else if (win_status.BatteryFlag == 128)
+ UpdateNumberBatteriesHistogram(NO_BATTERY);
+ else
+ UpdateNumberBatteriesHistogram(ONE_OR_MORE_BATTERIES);
+}
+
// Message-only window for handling battery changes on Windows.
class BatteryStatusObserver
: public base::RefCountedThreadSafe<BatteryStatusObserver> {
// values.
callback_.Run(blink::WebBatteryStatus());
}
+
+ UpdateNumberBatteriesHistogram();
}
void StopOnUI() {