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

content/browser/battery_status/battery_status_service_unittest.cc

 // Copyright 2014 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.
 
 #include "content/browser/battery_status/battery_status_service.h"
 
 #include "base/bind.h"
 #include "base/run_loop.h"
 #include "content/browser/battery_status/battery_status_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 
 namespace content {
 
 namespace {
 
 class FakeBatteryManager : public BatteryStatusManager {
  public:
   explicit FakeBatteryManager(
       const BatteryStatusService::BatteryUpdateCallback& callback)
-      : start_invoked_count_(0),
-        stop_invoked_count_(0) {
-    callback_ = callback;
-  }
+      : callback_(callback), start_invoked_count_(0), stop_invoked_count_(0) {}
   virtual ~FakeBatteryManager() { }
 
   // Methods from Battery Status Manager
   virtual bool StartListeningBatteryChange() OVERRIDE {
     start_invoked_count_++;
     return true;
   }
 
   virtual void StopListeningBatteryChange() OVERRIDE {
     stop_invoked_count_++;
   }
 
   void InvokeUpdateCallback(const blink::WebBatteryStatus& status) {
     callback_.Run(status);
   }
 
   int start_invoked_count() const { return start_invoked_count_; }
   int stop_invoked_count() const { return stop_invoked_count_; }
 
  private:
+  BatteryStatusService::BatteryUpdateCallback callback_;
   int start_invoked_count_;
   int stop_invoked_count_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeBatteryManager);
 };
 
 class BatteryStatusServiceTest : public testing::Test {
  public:
     BatteryStatusServiceTest()
         : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
@@ skipping 130 matching lines @@
   subscription1.reset();
   battery_manager()->InvokeUpdateCallback(status);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(1, callback1_invoked_count());
   EXPECT_EQ(2, callback2_invoked_count());
 }
 
 }  // namespace
 
 }  // namespace content