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

chrome/browser/password_manager/password_store_win_unittest.cc

Index: chrome/browser/password_manager/password_store_win_unittest.cc
diff --git a/chrome/browser/password_manager/password_store_win_unittest.cc b/chrome/browser/password_manager/password_store_win_unittest.cc
index c19cf8b67a92435de2e84a540a2c5ab62d525211..ee24ae6116b7ed415cbb872a03f21542812c9291 100644
--- a/chrome/browser/password_manager/password_store_win_unittest.cc
+++ b/chrome/browser/password_manager/password_store_win_unittest.cc
@@ -35,7 +35,8 @@ 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 {