Issue 1795 - Add helper std::wstring GetLocationUrl(IWebBrowser2& browser)

src/plugin/PluginUtil.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 27 matching lines @@
 {
   return FileUrl(HtmlFolderPath() + L"firstRun.html");
 }
 
 std::wstring FileUrl(const std::wstring& path)
 {
   std::wstring url = path;
   std::replace(url.begin(), url.end(), L'\\', L'/');
   return L"file:///" + url;
 }
+
+std::wstring GetLocationUrl(IWebBrowser2& browser)
+{
+  ATL::CComBSTR locationUrl;
+  if (FAILED(browser.get_LocationURL(&locationUrl)) || !locationUrl)
+  {
+    return std::wstring();
+  }
+  return std::wstring(locationUrl, locationUrl.Length());
+}