Add missing (and remove superfluous) 'explicit' from constructors.

chrome/browser/extensions/script_badge_controller.h

 // Copyright (c) 2012 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_SCRIPT_BADGE_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_SCRIPT_BADGE_CONTROLLER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 28 matching lines @@
 //
 // When extension IDs are recorded a NOTIFICATION_EXTENSION_LOCATION_BAR_UPDATED
 // is sent, and those extensions will be returned from GetCurrentActions until
 // the next page navigation.
 class ScriptBadgeController
     : public LocationBarController,
       public TabHelper::ScriptExecutionObserver,
       public content::WebContentsObserver,
       public content::NotificationObserver {
  public:
-  explicit ScriptBadgeController(content::WebContents* web_contents,
-                                 TabHelper* tab_helper);
+  ScriptBadgeController(content::WebContents* web_contents,
+                        TabHelper* tab_helper);
   virtual ~ScriptBadgeController();
 
   // LocationBarController implementation.
   virtual std::vector<ExtensionAction*> GetCurrentActions() const OVERRIDE;
   virtual void GetAttentionFor(const std::string& extension_id) OVERRIDE;
   virtual Action OnClicked(const std::string& extension_id,
                            int mouse_button) OVERRIDE;
   virtual void NotifyChange() OVERRIDE;
 
   // TabHelper::ScriptExecutionObserver implementation.
@@ skipping 40 matching lines @@
 
   // Listen to extension unloaded notifications.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ScriptBadgeController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SCRIPT_BADGE_CONTROLLER_H_