Remove explicit keyword from multi-argument constructors

chrome/browser/extensions/extension_prefs.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_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 50 matching lines @@
     LAUNCH_FULLSCREEN,
     LAUNCH_WINDOW,
 
     // Launch an app in the in the way a click on the NTP would,
     // if no user pref were set.  Update this constant to change
     // the default for the NTP and chrome.management.launchApp().
     LAUNCH_DEFAULT = LAUNCH_REGULAR
   };
 
   // Does not assume ownership of |prefs| and |incognito_prefs|.
-  explicit ExtensionPrefs(PrefService* prefs,
-                          const FilePath& root_dir,
-                          ExtensionPrefValueMap* extension_pref_value_map);
+  ExtensionPrefs(PrefService* prefs,
+                 const FilePath& root_dir,
+                 ExtensionPrefValueMap* extension_pref_value_map);
   virtual ~ExtensionPrefs();
 
   // Returns a copy of the Extensions prefs.
   // TODO(erikkay) Remove this so that external consumers don't need to be
   // aware of the internal structure of the preferences.
   base::DictionaryValue* CopyCurrentExtensions();
 
   // Returns true if the specified external extension was uninstalled by the
   // user.
   bool IsExternalExtensionUninstalled(const std::string& id) const;
@@ skipping 364 matching lines @@
 
   scoped_refptr<ExtensionContentSettingsStore> content_settings_store_;
 
   // The URLs of all of the toolstrips.
   URLList shelf_order_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_