Migrate RenderProcessHost, ChildThread to InterfaceRegistry/Provider

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index c8e6b11db668dca812fd76f3beb2eb81a4cd0ae5..506cbcb406afa97d6d832ba94eeec3fde328777e 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -232,9 +232,9 @@ RenderFrameHostImpl* RenderFrameHostManager::Navigate(
     // with the new render frame if necessary.  Note that this call needs to
     // occur before initializing the RenderView; the flow of creating the
     // RenderView can cause browser-side code to execute that expects the this
-    // RFH's ServiceRegistry to be initialized (e.g., if the site is a WebUI
-    // site that is handled via Mojo, then Mojo WebUI code in //chrome will
-    // add a service to this RFH's ServiceRegistry).
+    // RFH's shell::InterfaceRegistry to be initialized (e.g., if the site is a
+    // WebUI site that is handled via Mojo, then Mojo WebUI code in //chrome
+    // will add an interface to this RFH's InterfaceRegistry).
     dest_render_frame_host->SetUpMojoIfNeeded();
 
     // Recreate the opener chain.