Rewrite the Android implementation of BatteryMonitor directly in Java.

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 57bb58baf5fa805548d4d3e507a7063b1233b5e1..6ca544333113936286dbbaa30412ef5646fedd58 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -157,6 +157,7 @@
 #if defined(OS_ANDROID)
 #include "content/browser/android/child_process_launcher_android.h"
 #include "content/browser/media/android/browser_demuxer_android.h"
+#include "content/browser/mojo/service_registrar_android.h"
 #include "content/browser/screen_orientation/screen_orientation_message_filter_android.h"
 #endif
 
@@ -898,6 +899,11 @@ void RenderProcessHostImpl::RegisterMojoServices() {
       base::Bind(&PermissionServiceContext::CreateService,
                  base::Unretained(permission_service_context_.get())));
 
+#if defined(OS_ANDROID)
+  ServiceRegistrarAndroid::RegisterProcessHostServices(
+      mojo_application_host_->service_registry_android());
+#endif
+
   GetContentClient()->browser()->OverrideRenderProcessMojoServices(
       mojo_application_host_->service_registry());
 }