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 89ce30b31724b5339618a1d42a7e178e895c571a..135a0e72d954d2a3ac2502843b1da3104e690724 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -42,6 +42,7 @@
 #include "base/tracked_objects.h"
 #include "content/browser/appcache/appcache_dispatcher_host.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
+#include "content/browser/battery_status/battery_status_message_filter.h"
 #include "content/browser/browser_main.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/child_process_security_policy_impl.h"
@@ -579,6 +580,7 @@ void RenderProcessHostImpl::CreateMessageFilters() {
 #elif defined(OS_WIN)
   channel_->AddFilter(new FontCacheDispatcher());
 #endif
+  channel_->AddFilter(new content::BatteryStatusMessageFilter());
 
   SocketStreamDispatcherHost* socket_stream_dispatcher_host =
       new SocketStreamDispatcherHost(GetID(),