Mandoline: Move ContentHandlerConnection into separate file

mojo/shell/shell_impl.cc

Index: mojo/shell/shell_impl.cc
diff --git a/mojo/shell/shell_impl.cc b/mojo/shell/shell_impl.cc
index 3dd524962db47bca97674b73a084cba1da4b0768..4b10471b0b3e9078b5714a831e406290313ca54e 100644
--- a/mojo/shell/shell_impl.cc
+++ b/mojo/shell/shell_impl.cc
@@ -70,9 +70,9 @@ void ShellImpl::ConnectToApplication(mojo::URLRequestPtr app_request,
     LOG(ERROR) << "Error: invalid URL: " << app_request;
     return;
   }
-  manager_->ConnectToApplication(app_request.Pass(), identity_.url,
-                                 services.Pass(), exposed_services.Pass(),
-                                 base::Closure());
+  manager_->ConnectToApplication(app_request.Pass(), std::string(),
+                                 identity_.url, services.Pass(),
+                                 exposed_services.Pass(), base::Closure());
 }
 
 void ShellImpl::QuitApplication() {
@@ -93,7 +93,8 @@ void ShellImpl::OnConnectionError() {
   for (auto request : queued_client_requests) {
     mojo::URLRequestPtr url(mojo::URLRequest::New());
     url->url = mojo::String::From(request->requested_url.spec());
-    manager->ConnectToApplication(url.Pass(), request->requestor_url,
+    manager->ConnectToApplication(url.Pass(), std::string(),
+                                  request->requestor_url,
                                   request->services.Pass(),
                                   request->exposed_services.Pass(),
                                   base::Closure());