Remove explicit keyword from multi-argument constructors

chrome/browser/chromeos/setting_level_bubble.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_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
 #define CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/timer.h"
@@ skipping 26 matching lines @@
   // 1. Brightness is at 50%.
   // 2. Power manager dims brightness to 25% automatically.
   // 3. User hits the "increase brightness" button, setting brightness to 30%.
   //
   // If we didn't update our internal state to 25% after 2), then the animation
   // displayed in response to 3) would show the bubble animating from 50% down
   // to 30%, rather than from 25% up to 30%.
   void UpdateWithoutShowingBubble(int percent);
 
  protected:
-  explicit SettingLevelBubble(SkBitmap* increase_icon,
-                              SkBitmap* decrease_icon,
-                              SkBitmap* zero_icon);
+  SettingLevelBubble(SkBitmap* increase_icon,
+                     SkBitmap* decrease_icon,
+                     SkBitmap* zero_icon);
   virtual ~SettingLevelBubble();
 
  private:
   void OnTimeout();
 
   // Overridden from BubbleDelegate.
   virtual void BubbleClosing(Bubble* bubble, bool closed_by_escape);
   virtual bool CloseOnEscape();
   virtual bool FadeInOnShow();
 
@@ skipping 19 matching lines @@
 
   ui::SlideAnimation animation_;
   base::OneShotTimer<SettingLevelBubble> timeout_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingLevelBubble);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_