Decouple Power Monitor from //content.

device/power_monitor/BUILD.gn

+# Copyright 2016 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.
+
+import("//build/config/features.gni")
+
+component("power_monitor_broadcast_source") {

[blundell, 2016/10/28 21:33:51]

This is the client-side code of power monitor, so it should go in
//device/power_monitor/public/cpp.

[ke.he, 2016/10/29 11:10:53]

Done.

+  sources = [
+    "power_monitor_broadcast_source.cc",
+    "power_monitor_broadcast_source.h",
+    "power_monitor_export.h",
+  ]
+
+  defines = [ "DEVICE_POWER_MONITOR_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+    "//mojo/public/cpp/bindings",
+  ]
+
+  public_deps = [
+    "//device/power_monitor/public/interfaces",
+  ]
+}
+
+component("power_monitor_message_broadcaster") {

[blundell, 2016/10/28 21:33:51]

this is the implementation of power_monitor, so it should stay here and just be
named (as a target) "power_monitor".

[ke.he, 2016/10/29 11:10:53]

Done.

+  sources = [
+    "power_monitor_export.h",
+    "power_monitor_message_broadcaster.cc",
+    "power_monitor_message_broadcaster.h",
+  ]
+
+  defines = [ "DEVICE_POWER_MONITOR_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+    "//mojo/public/cpp/bindings",
+  ]
+
+  public_deps = [
+    "//device/power_monitor/public/interfaces",
+  ]
+}