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

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 8454ae387d131789e7e0dc4b194921328f4c5b31..452b758741f06e10c6538e6d51e26c746147bc38 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -118,6 +118,10 @@
 #include "content/browser/speech/input_tag_speech_dispatcher_host.h"
 #endif
 
+#if defined(OS_CHROMEOS)
+#include "content/browser/battery_status/battery_status_message_filter.h"
+#endif
+
 #include "third_party/skia/include/core/SkBitmap.h"
 
 using content::BrowserContext;
@@ -522,6 +526,10 @@ void RenderProcessHostImpl::CreateMessageFilters() {
   channel_->AddFilter(new FontCacheDispatcher());
 #endif
 
+#if defined(OS_CHROMEOS)
+  channel_->AddFilter(new BatteryStatusMessageFilter());
+#endif
+
   SocketStreamDispatcherHost* socket_stream_dispatcher_host =
       new SocketStreamDispatcherHost(GetID(),
           new RendererURLRequestContextSelector(browser_context, GetID()),