Battery Status API: implementation for Windows.

content/content_browser.gypi

Index: content/content_browser.gypi
diff --git a/content/content_browser.gypi b/content/content_browser.gypi
index b1477e41f79ad0d796ac23ec9dcc9aec7bb0087b..c80ed23265f7b1ecb6810a0a6c9ebc9fa275285a 100644
--- a/content/content_browser.gypi
+++ b/content/content_browser.gypi
@@ -369,6 +369,7 @@
       'browser/battery_status/battery_status_manager_android.h',
       'browser/battery_status/battery_status_manager_chromeos.cc',
       'browser/battery_status/battery_status_manager_default.cc',
+      'browser/battery_status/battery_status_manager_win.cc',
       'browser/battery_status/battery_status_manager_mac.cc',
       'browser/battery_status/battery_status_manager.h',
       'browser/battery_status/battery_status_message_filter.cc',
@@ -1830,6 +1831,7 @@
     ['OS == "win"', {
       'sources!': [
         'browser/geolocation/empty_wifi_data_provider.cc',
+        'browser/battery_status/battery_status_manager_default.cc',
       ],
     }],
     ['OS == "linux" and use_dbus==1', {