Use unique URLs rather than qualifiers to uniquify RenderProcesses.

mojo/shell/shell_application_delegate.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/shell/shell_application_delegate.h"
 
 #include "mojo/application/public/cpp/application_connection.h"
 #include "mojo/shell/application_manager.h"
 
 namespace mojo {
@@ skipping 10 matching lines @@
   connection->AddService<mojom::ApplicationManager>(this);
   return true;
 }
 
 void ShellApplicationDelegate::Create(
     ApplicationConnection* connection,
     InterfaceRequest<mojom::ApplicationManager> request) {
   bindings_.AddBinding(this, request.Pass());
 }
 
-void ShellApplicationDelegate::CreateInstanceForHandle(
-    ScopedHandle channel,
-    const String& url,
-    const String& qualifier) {
-  manager_->CreateInstanceForHandle(channel.Pass(), GURL(url), qualifier);
+void ShellApplicationDelegate::CreateInstanceForHandle(ScopedHandle channel,
+                                                       const String& url) {
+  manager_->CreateInstanceForHandle(channel.Pass(), GURL(url));
 }
 
 }  // namespace shell
 }  // namespace mojo