Use unique URLs rather than qualifiers to uniquify RenderProcesses.

content/browser/mojo/mojo_shell_client_host.h

Index: content/browser/mojo/mojo_shell_client_host.h
diff --git a/content/browser/mojo/mojo_shell_client_host.h b/content/browser/mojo/mojo_shell_client_host.h
index 3f2b4dadcd9a79dd9d483c905d25123611d25b30..6f61f71e205fd0d9fe599d27c04e5e5aeaa136e5 100644
--- a/content/browser/mojo/mojo_shell_client_host.h
+++ b/content/browser/mojo/mojo_shell_client_host.h
@@ -5,14 +5,14 @@
 #ifndef CONTENT_BROWSER_MOJO_MOJO_SHELL_CLIENT_HOST_H_
 #define CONTENT_BROWSER_MOJO_MOJO_SHELL_CLIENT_HOST_H_
 
-#include "base/process/process_handle.h"
+#include <string>
 
-namespace IPC {
-class Sender;
-}
+#include "base/process/process_handle.h"
 
 namespace content {
 
+class RenderProcessHost;
+
 // Creates a communication channel between the external Mojo shell and the
 // child. The server handle of this channel is shared with the external shell
 // via Mojo IPC and the client handle is shared with the child via Chrome IPC.
@@ -20,7 +20,13 @@ namespace content {
 // instance map.
 void RegisterChildWithExternalShell(int child_process_id,
                                     base::ProcessHandle process_handle,
-                                    IPC::Sender* sender);
+                                    RenderProcessHost* render_process_host);
+
+// Returns the URL associated with an instance corresponding to the renderer
+// process in the external shell. This URL can be passed to
+// ConnectToApplication() to open a new connection to this renderer.
+std::string GetMojoApplicationInstanceURL(
+    RenderProcessHost* render_process_host);
 
 }  // namespace content