Added VLOG(1) loggings to mdns extensions API code

chrome/browser/local_discovery/service_discovery_device_lister.cc

Index: chrome/browser/local_discovery/service_discovery_device_lister.cc
diff --git a/chrome/browser/local_discovery/service_discovery_device_lister.cc b/chrome/browser/local_discovery/service_discovery_device_lister.cc
index 0d906459a1502de01fa43126fdbad320dd4846b0..60fb8a62258b778d8183b4be55602b42653858b8 100644
--- a/chrome/browser/local_discovery/service_discovery_device_lister.cc
+++ b/chrome/browser/local_discovery/service_discovery_device_lister.cc
@@ -32,17 +32,22 @@ ServiceDiscoveryDeviceLister::~ServiceDiscoveryDeviceLister() {
 }
 
 void ServiceDiscoveryDeviceLister::Start() {
+  VLOG(1) << "In Start(), service_type: " << service_type_;
   CreateServiceWatcher();
 }
 
 void ServiceDiscoveryDeviceLister::DiscoverNewDevices(bool force_update) {
+  VLOG(1) << "In DiscoverNewDevices(), service_type: " << service_type_;
   service_watcher_->DiscoverNewServices(force_update);
 }
 
 void ServiceDiscoveryDeviceLister::OnServiceUpdated(
     ServiceWatcher::UpdateType update,
     const std::string& service_name) {
+  VLOG(1) << "In OnServiceUpdated(), service_type: " << service_type_
+          << "service_name: " << service_name;
   if (update == ServiceWatcher::UPDATE_INVALIDATED) {
+    VLOG(1) << "Update = invalidate, flushing device cache";
     resolvers_.clear();
     CreateServiceWatcher();
 
@@ -52,12 +57,14 @@ void ServiceDiscoveryDeviceLister::OnServiceUpdated(
 
   if (update != ServiceWatcher::UPDATE_REMOVED) {
     bool added = (update == ServiceWatcher::UPDATE_ADDED);
+    VLOG(1) << "Update type: " << update << ", added: " << added;
     std::pair<ServiceResolverMap::iterator, bool> insert_result =
         resolvers_.insert(make_pair(service_name,
                                     linked_ptr<ServiceResolver>(NULL)));
 
     // If there is already a resolver working on this service, don't add one.
     if (insert_result.second) {
+      VLOG(1) << "Adding resolver for service_name: " << service_name;
       scoped_ptr<ServiceResolver> resolver =
           service_discovery_client_->CreateServiceResolver(
           service_name, base::Bind(
@@ -68,8 +75,13 @@ void ServiceDiscoveryDeviceLister::OnServiceUpdated(
 
       insert_result.first->second.reset(resolver.release());
       insert_result.first->second->StartResolving();
+    } else {
+      VLOG(1) << "Resolver for service_name already exists, ignoring: "
+              << service_name;
     }
   } else {
+    // TODO(imcheng): Why doesn't this do a resolvers_.erase(service_name); ?
+    VLOG(1) << "Update = remove, service_name: " << service_name;
     delegate_->OnDeviceRemoved(service_name);
   }
 }
@@ -80,7 +92,10 @@ void ServiceDiscoveryDeviceLister::OnResolveComplete(
     std::string service_name,
     ServiceResolver::RequestStatus status,
     const ServiceDescription& service_description) {
+  VLOG(1) << "In OnResolveComplete(), service_type: " << service_type_
+          << "service_name: " << service_name;
   if (status == ServiceResolver::STATUS_SUCCESS) {
+    VLOG(1) << "Resolve was successful, calling OnDeviceChanged()";
     delegate_->OnDeviceChanged(added, service_description);
 
 #if defined(OS_MACOSX)
@@ -97,6 +112,7 @@ void ServiceDiscoveryDeviceLister::OnResolveComplete(
 #endif
   } else {
     // TODO(noamsml): Add retry logic.
+    VLOG(1) << "Resolve was unsuccessful, status: " << status;
   }
   resolvers_.erase(service_name);
 }