Remove explicit keyword from multi-argument constructors

chrome/browser/extensions/extension_web_ui.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_
 #pragma once
 
 #include <string>
 
@@ skipping 15 matching lines @@
 }
 
 // This class implements WebUI for extensions and allows extensions to put UI in
 // the main tab contents area. For example, each extension can specify an
 // "options_page", and that page is displayed in the tab contents area and is
 // hosted by this class.
 class ExtensionWebUI : public ChromeWebUI {
  public:
   static const char kExtensionURLOverrides[];
 
-  explicit ExtensionWebUI(TabContents* tab_contents, const GURL& url);
+  ExtensionWebUI(TabContents* tab_contents, const GURL& url);
 
   virtual ~ExtensionWebUI();
 
   virtual ExtensionBookmarkManagerEventRouter*
       extension_bookmark_manager_event_router();
 
   // BrowserURLHandler
   static bool HandleChromeURLOverride(GURL* url, Profile* profile);
   static bool HandleChromeURLOverrideReverse(GURL* url, Profile* profile);
 
@@ skipping 27 matching lines @@
   // TODO(aa): This seems out of place. Why is it not with the event routers for
   // the other extension APIs?
   scoped_ptr<ExtensionBookmarkManagerEventRouter>
       extension_bookmark_manager_event_router_;
 
   // The URL this WebUI was created for.
   GURL url_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_