Battery Status API: add plumbing for multi-platform support.

content/browser/DEPS

 include_rules = [
   "+content/public/browser",
   "+media/audio",  # For audio input for speech input feature.
   "+media/base",  # For Android JNI registration.
   "+media/midi",  # For Web MIDI API
   "+media/video",  # For Video Device monitoring in Mac.
   "+sql",
   "+ui/webui",
   "+win8/util",
 
@@ skipping 13 matching lines @@
   # Allow non-browser Chrome OS code to be used.
   "+chromeos",
   "+third_party/cros_system_api",
 
   "-webkit/child",
   "-webkit/renderer",
 
   # No inclusion of WebKit from the browser, other than strictly enum/POD,
   # header-only types, and some selected common code.
   "-third_party/WebKit",
+  "+third_party/WebKit/public/platform/WebBatteryStatus.h",
   "+third_party/WebKit/public/platform/WebCursorInfo.h",
   "+third_party/WebKit/public/platform/WebGamepad.h",
   "+third_party/WebKit/public/platform/WebGamepads.h",
   "+third_party/WebKit/public/platform/WebGraphicsContext3D.h",
   "+third_party/WebKit/public/platform/WebIDBDatabaseException.h",
   "+third_party/WebKit/public/platform/WebIDBTypes.h",
   "+third_party/WebKit/public/platform/WebReferrerPolicy.h",
   "+third_party/WebKit/public/platform/WebScreenOrientationLockType.h",
   "+third_party/WebKit/public/platform/WebScreenOrientationType.h",
   "+third_party/WebKit/public/platform/WebScreenInfo.h",
@@ skipping 22 matching lines @@
   # These should be burned down. http://crbug.com/237267
   "!third_party/WebKit/public/web/mac/WebInputEventFactory.h",
 
   "+ui/ozone/ozone_platform.h",
   "+ui/ozone/ozone_switches.h",
 
   # DO NOT ADD ANY CHROME OR COMPONENTS INCLUDES HERE!!!
   # See https://sites.google.com/a/chromium.org/dev/developers/content-module
   # for more information.
 ]