Add Origin Power Map to Store Battery Auditing Data.

chrome/browser/power/origin_power_map.h

Index: chrome/browser/power/origin_power_map.h
diff --git a/chrome/browser/power/origin_power_map.h b/chrome/browser/power/origin_power_map.h
new file mode 100644
index 0000000000000000000000000000000000000000..b6448fd7f4e162b7f91447a44b08df77b5f82f42
--- /dev/null
+++ b/chrome/browser/power/origin_power_map.h
@@ -0,0 +1,58 @@
+// 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.
+
+#ifndef CHROME_BROWSER_POWER_ORIGIN_POWER_MAP_H_
+#define CHROME_BROWSER_POWER_ORIGIN_POWER_MAP_H_
+
+#include <map>
+
+#include "base/memory/ref_counted.h"

[sky, 2014/08/06 23:59:23]

Do you really need the ref_counted include?

[Daniel Nishi, 2014/08/07 21:15:08]

Unnecessary include removed.

+#include "components/keyed_service/core/keyed_service.h"
+#include "url/gurl.h"
+
+class PrefService;
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
+// Tracks app and website origins and how much power they are consuming while
+// running.
+class OriginPowerMap : public KeyedService {
+ public:
+  explicit OriginPowerMap(PrefService* prefs);
+  virtual ~OriginPowerMap();
+
+  typedef std::map<GURL, int> ScaledOriginMap;

[sky, 2014/08/06 23:59:23]

typedefs should be first in a section (see style guide).

[sky, 2014/08/06 23:59:23]

Why is this named Scaled? Percent would be more meaningful here and in the name
of your getter below.

[Daniel Nishi, 2014/08/07 21:15:08]

I was thinking that since it was scaled to 100 as a percent.

Percent is more accurate, though. I've changed over all instances of the word
Scaled to Percent.

[Daniel Nishi, 2014/08/07 21:15:08]

Typedefs moved up.

+
+  // Returns the integer percentage usage of the total power consumed by a
+  // given origin.
+  int GetPowerForOrigin(const GURL& origin);
+
+  // Add a certain amount of power consumption to a given origin.
+  void AddPowerForOrigin(const GURL& origin, double power);

[sky, 2014/08/06 23:59:23]

Document what |power| means here. It's worth a description at the class level as
to how tracking is done.

[Daniel Nishi, 2014/08/07 21:15:08]

Since the definition of |power| is platform specific, should the platform
specific notes be included here or in the implementation by platform?

+
+  // Return a map of all origins to the integer percentage usage of power
+  // consumed.
+  scoped_ptr<ScaledOriginMap> GetScaledOriginMap();

[sky, 2014/08/06 23:59:23]

nit: const

[Daniel Nishi, 2014/08/07 21:15:08]

Done.

+  void SavePrefs();
+
+  // Register per-profile preferences for the power consumed by origin.
+  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
+ private:
+  typedef std::map<GURL, double> OriginMap;
+  OriginMap origin_map_;
+
+  // The total amount of power consumed since the last wipe.
+  double total_consumed_;
+
+  PrefService* prefs_;
+};

[sky, 2014/08/06 23:59:23]

DISALLOW_...

[Daniel Nishi, 2014/08/07 21:15:08]

Done.

+
+#endif  // CHROME_BROWSER_POWER_ORIGIN_POWER_MAP_H_