Fix a memory leak in PasswordStoreMac

chrome/browser/password_manager/password_store_mac.cc

Index: chrome/browser/password_manager/password_store_mac.cc
diff --git a/chrome/browser/password_manager/password_store_mac.cc b/chrome/browser/password_manager/password_store_mac.cc
index 5fad2ae20e1fbb20bbd5770af9e9a52b7d41ee8d..dd5de821a3bdd2074b9ab4b94b737e66259da751 100644
--- a/chrome/browser/password_manager/password_store_mac.cc
+++ b/chrome/browser/password_manager/password_store_mac.cc
@@ -618,19 +618,14 @@ std::vector<PasswordForm*> MacKeychainPasswordFormAdapter::PasswordsFillingForm(
   return ConvertKeychainItemsToForms(&keychain_items);
 }
 
-PasswordForm* MacKeychainPasswordFormAdapter::PasswordExactlyMatchingForm(
+bool MacKeychainPasswordFormAdapter::PasswordExactlyMatchingForm(
     const PasswordForm& query_form) {
   SecKeychainItemRef keychain_item = KeychainItemForForm(query_form);
   if (keychain_item) {
-    PasswordForm* form = new PasswordForm();
-    internal_keychain_helpers::FillPasswordFormFromKeychainItem(*keychain_,
-                                                                keychain_item,
-                                                                form,
-                                                                true);
     keychain_->Free(keychain_item);
-    return form;
+    return true;
   }
-  return NULL;
+  return false;
 }
 
 bool MacKeychainPasswordFormAdapter::HasPasswordsMergeableWithForm(
@@ -942,9 +937,7 @@ PasswordStoreChangeList PasswordStoreMac::RemoveLoginImpl(
     // handle deletes on them the way we would for an imported item.)
     MacKeychainPasswordFormAdapter owned_keychain_adapter(keychain_.get());
     owned_keychain_adapter.SetFindsOnlyOwnedItems(true);
-    PasswordForm* owned_password_form =
-        owned_keychain_adapter.PasswordExactlyMatchingForm(form);
-    if (owned_password_form) {
+    if (owned_keychain_adapter.PasswordExactlyMatchingForm(form)) {
       // If we don't have other forms using it (i.e., a form differing only by
       // the names of the form elements), delete the keychain entry.
       if (!DatabaseHasFormMatchingKeychainForm(form)) {