battery-status: Implement the battery-status API for chromeos.

content/browser/battery_status/battery_status_browsertest.cc

Index: content/browser/battery_status/battery_status_browsertest.cc
diff --git a/content/browser/battery_status/battery_status_browsertest.cc b/content/browser/battery_status/battery_status_browsertest.cc
index 76878315054c786e6a2ab9077f6e816647391194..f5e9be0b496f3f7c2eafc289c8be36c41d90b6af 100644
--- a/content/browser/battery_status/battery_status_browsertest.cc
+++ b/content/browser/battery_status/battery_status_browsertest.cc
@@ -22,10 +22,7 @@ class FakeBatteryManager : public BatteryStatusManager {
  public:
   explicit FakeBatteryManager(
       const BatteryStatusService::BatteryUpdateCallback& callback)
-      : battery_status_available_(true),
-        started_(false) {
-    callback_ = callback;
-  }
+      : callback_(callback), battery_status_available_(true), started_(false) {}
   virtual ~FakeBatteryManager() { }
 
   // Methods from BatteryStatusManager.
@@ -55,6 +52,7 @@ class FakeBatteryManager : public BatteryStatusManager {
   }
 
  private:
+  BatteryStatusService::BatteryUpdateCallback callback_;
   bool battery_status_available_;
   bool started_;
   blink::WebBatteryStatus status_;