Fix DCHECK, memory leak, and refactor PasswordStore to use CancelableRequest

chrome/browser/password_manager/password_store_win_unittest.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <windows.h>
 #include <wincrypt.h>
 #include <string>
 #include <vector>
 
 #include "base/message_loop.h"
@@ skipping 17 matching lines @@
 using testing::_;
 using testing::DoAll;
 using testing::WithArg;
 using webkit_glue::PasswordForm;
 
 namespace {
 
 class MockPasswordStoreConsumer : public PasswordStoreConsumer {
  public:
   MOCK_METHOD2(OnPasswordStoreRequestDone,
-               void(int, const std::vector<webkit_glue::PasswordForm*>&));
+               void(PasswordStore::Handle,
+                    const std::vector<webkit_glue::PasswordForm*>&));
 };
 
 class MockWebDataServiceConsumer : public WebDataServiceConsumer {
 public:
   MOCK_METHOD2(OnWebDataServiceRequestDone,
                void(WebDataService::Handle, const WDTypedResult*));
 };
 
 }  // anonymous namespace
 
@@ skipping 447 matching lines @@
   BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
       new SignalingTask(&done));
   done.Wait();
 
   // Handle the callback from the WDS.
   MessageLoop::current()->RunAllPending();
 
   STLDeleteElements(&expected_autofillable);
   STLDeleteElements(&expected_blacklisted);
 }