Remove some content_child dependency from content_common

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 37e8a9b27c3cb9e97c03396a8cda99c83061372d..a4ed1e818b4a0860ba2daecf5f514830fdc9f19e 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -652,11 +652,11 @@ scoped_refptr<base::MessageLoopProxy>
 }
 
 void RenderThreadImpl::AddRoute(int32 routing_id, IPC::Listener* listener) {
-  ChildThread::AddRoute(routing_id, listener);
+  ChildThread::GetRouter()->AddRoute(routing_id, listener);
 }
 
 void RenderThreadImpl::RemoveRoute(int32 routing_id) {
-  ChildThread::RemoveRoute(routing_id);
+  ChildThread::GetRouter()->RemoveRoute(routing_id);
 }
 int RenderThreadImpl::GenerateRoutingID() {
   int routing_id = MSG_ROUTING_NONE;