chrome: dbus: support asynchronous method replies

chrome/browser/chromeos/dbus/proxy_resolution_service_provider.cc

Index: chrome/browser/chromeos/dbus/proxy_resolution_service_provider.cc
diff --git a/chrome/browser/chromeos/dbus/proxy_resolution_service_provider.cc b/chrome/browser/chromeos/dbus/proxy_resolution_service_provider.cc
index 921cf805a7b3bac62a2ed3f676c0f29e6b1bc743..54fc6fac69f090a398eeb3395bd6cdd11fbe891c 100644
--- a/chrome/browser/chromeos/dbus/proxy_resolution_service_provider.cc
+++ b/chrome/browser/chromeos/dbus/proxy_resolution_service_provider.cc
@@ -224,8 +224,9 @@ bool ProxyResolutionServiceProvider::OnOriginThread() {
   return base::PlatformThread::CurrentId() == origin_thread_id_;
 }
 
-dbus::Response* ProxyResolutionServiceProvider::ResolveProxyHandler(
-    dbus::MethodCall* method_call) {
+void ProxyResolutionServiceProvider::ResolveProxyHandler(
+    dbus::MethodCall* method_call,
+    dbus::ExportedObject::SendResponseCallback send_response_cb) {
   DCHECK(OnOriginThread());
   VLOG(1) << "Handing method call: " << method_call->ToString();
   // The method call should contain the three string parameters.
@@ -237,7 +238,8 @@ dbus::Response* ProxyResolutionServiceProvider::ResolveProxyHandler(
       !reader.PopString(&signal_interface) ||
       !reader.PopString(&signal_name)) {
     LOG(ERROR) << "Unexpected method call: " << method_call->ToString();
-    return NULL;
+    send_response_cb.Run(NULL);
+    return;
   }
 
   resolver_->ResolveProxy(source_url,
@@ -248,18 +250,20 @@ dbus::Response* ProxyResolutionServiceProvider::ResolveProxyHandler(
   // Return an empty response for now. We'll send a signal once the
   // network proxy resolution is completed.
   dbus::Response* response = dbus::Response::FromMethodCall(method_call);
-  return response;
+  send_response_cb.Run(response);
 }
 
 // static
-dbus::Response* ProxyResolutionServiceProvider::CallResolveProxyHandler(
+void ProxyResolutionServiceProvider::CallResolveProxyHandler(
     base::WeakPtr<ProxyResolutionServiceProvider> provider_weak_ptr,
-    dbus::MethodCall* method_call) {
+    dbus::MethodCall* method_call,
+    dbus::ExportedObject::SendResponseCallback send_response_cb) {
   if (!provider_weak_ptr) {
     LOG(WARNING) << "Called after the object is deleted";
-    return NULL;
+    send_response_cb.Run(NULL);
+    return;
   }
-  return provider_weak_ptr->ResolveProxyHandler(method_call);
+  provider_weak_ptr->ResolveProxyHandler(method_call, send_response_cb);
 }
 
 ProxyResolutionServiceProvider* ProxyResolutionServiceProvider::Create() {