Fixes for re-enabling more MSVC level 4 warnings: chrome/browser/ edition

chrome/browser/extensions/external_install_error.cc

 // Copyright 2014 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 "chrome/browser/extensions/external_install_error.h"
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 302 matching lines @@
       ->GetExtensionById(extension_id_, ExtensionRegistry::EVERYTHING);
 }
 
 void ExternalInstallError::OnWebstoreRequestFailure() {
   OnFetchComplete();
 }
 
 void ExternalInstallError::OnWebstoreResponseParseSuccess(
     scoped_ptr<base::DictionaryValue> webstore_data) {
   std::string localized_user_count;
-  double average_rating;
-  int rating_count;
+  double average_rating = 0;
+  int rating_count = 0;
   if (!webstore_data->GetString(kUsersKey, &localized_user_count) ||
       !webstore_data->GetDouble(kAverageRatingKey, &average_rating) ||
       !webstore_data->GetInteger(kRatingCountKey, &rating_count)) {
     // If we don't get a valid webstore response, short circuit, and continue
     // to show a prompt without webstore data.
     OnFetchComplete();
     return;
   }
 
   bool show_user_count = true;
@@ skipping 47 matching lines @@
     if (browser)
       global_error_->ShowBubbleView(browser);
   } else {
     DCHECK(alert_type_ == MENU_ALERT);
     global_error_.reset(new ExternalInstallMenuAlert(this));
     error_service_->AddGlobalError(global_error_.get());
   }
 }
 
 }  // namespace extensions