chromeos: Add support for the battery status API on chromeos.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 76e4781125471250e8dee52feb435df631d54f35..7d43ceec4655dfdef2c0237a3ba586d3b34cde09 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -53,6 +53,7 @@
 #include "content/public/renderer/navigation_state.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "content/public/renderer/render_view_visitor.h"
+#include "content/renderer/battery_status_dispatcher.h"
 #include "content/renderer/device_orientation_dispatcher.h"
 #include "content/renderer/devtools_agent.h"
 #include "content/renderer/dom_automation_controller.h"
@@ -456,6 +457,7 @@ RenderViewImpl::RenderViewImpl(
       geolocation_dispatcher_(NULL),
       input_tag_speech_dispatcher_(NULL),
       device_orientation_dispatcher_(NULL),
+      battery_status_dispatcher_(NULL),
       media_stream_dispatcher_(NULL),
       p2p_socket_dispatcher_(NULL),
       devtools_agent_(NULL),
@@ -5083,6 +5085,14 @@ WebKit::WebDeviceOrientationClient* RenderViewImpl::deviceOrientationClient() {
   return device_orientation_dispatcher_;
 }
 
+WebKit::WebBatteryStatusClient* RenderViewImpl::batteryStatusClient() {
+#if defined(OS_CHROMEOS)
+  if (!battery_status_dispatcher_)
+    battery_status_dispatcher_ = new BatteryStatusDispatcher(this);
+#endif
+  return battery_status_dispatcher_;
+}
+
 void RenderViewImpl::zoomLimitsChanged(double minimum_level,
                                        double maximum_level) {
   // For now, don't remember plugin zoom values.  We don't want to mix them with