Support exposing Mojo services between render frames, render threads, and their respective hosts.

content/child/mojo/mojo_application.cc

Index: content/child/mojo/mojo_application.cc
diff --git a/content/child/mojo/mojo_application.cc b/content/child/mojo/mojo_application.cc
index 79eea23846c1cb40b132725394857f8b7cb1042d..fc11e383cede495e7a0b8a2671ebbe637ee6d1b5 100644
--- a/content/child/mojo/mojo_application.cc
+++ b/content/child/mojo/mojo_application.cc
@@ -10,8 +10,7 @@
 
 namespace content {
 
-MojoApplication::MojoApplication(mojo::ServiceProvider* service_provider)
-    : service_provider_(service_provider) {
+MojoApplication::MojoApplication() {
 }
 
 MojoApplication::~MojoApplication() {
@@ -37,9 +36,7 @@ void MojoApplication::OnActivate(
       channel_init_.Init(handle,
                          ChildProcess::current()->io_message_loop_proxy());
   DCHECK(message_pipe.is_valid());
-
-  host_service_provider_.Bind(message_pipe.Pass());
-  host_service_provider_.set_client(service_provider_);
+  service_registry_.Bind(message_pipe.Pass());
 }
 
 }  // namespace content