contacts: Add ContactManagerInterface::GetWeakPtr().

chrome/browser/chromeos/contacts/contact_manager.cc

Index: chrome/browser/chromeos/contacts/contact_manager.cc
diff --git a/chrome/browser/chromeos/contacts/contact_manager.cc b/chrome/browser/chromeos/contacts/contact_manager.cc
index ee9db7518ab7a81c9d4cb5afb6fa7db5bb320ae2..fe10537179d4bbc891f25fe7dff853353f83c8a1 100644
--- a/chrome/browser/chromeos/contacts/contact_manager.cc
+++ b/chrome/browser/chromeos/contacts/contact_manager.cc
@@ -37,7 +37,8 @@ ContactManager* ContactManager::GetInstance() {
 ContactManager::ContactManager()
     : profile_observers_deleter_(&profile_observers_),
       contact_store_factory_(new GoogleContactStoreFactory),
-      contact_stores_deleter_(&contact_stores_) {
+      contact_stores_deleter_(&contact_stores_),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!g_instance);
   g_instance = this;
@@ -46,6 +47,7 @@ ContactManager::ContactManager()
 ContactManager::~ContactManager() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK_EQ(g_instance, this);
+  weak_ptr_factory_.InvalidateWeakPtrs();
   g_instance = NULL;
   for (ContactStoreMap::const_iterator it = contact_stores_.begin();
        it != contact_stores_.end(); ++it) {
@@ -77,6 +79,11 @@ void ContactManager::Init() {
     HandleProfileCreated(profiles[i]);
 }
 
+base::WeakPtr<ContactManagerInterface> ContactManager::GetWeakPtr() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  return weak_ptr_factory_.GetWeakPtr();
+}
+
 void ContactManager::AddObserver(ContactManagerObserver* observer,
                                  Profile* profile) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));