Remove explicit keyword from multi-argument constructors

chrome/browser/ui/gtk/custom_drag.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_UI_GTK_CUSTOM_DRAG_H_
 #define CHROME_BROWSER_UI_GTK_CUSTOM_DRAG_H_
 #pragma once
 
 #include <gtk/gtk.h>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "ui/base/gtk/gtk_signal.h"
 
 class BookmarkNode;
 class DownloadItem;
 class Profile;
 
 namespace gfx {
 class Image;
 }
 
 // Base class for programatically generated drags.
 class CustomDrag {
  protected:
-  explicit CustomDrag(gfx::Image* icon, int code_mask, GdkDragAction action);
+  CustomDrag(gfx::Image* icon, int code_mask, GdkDragAction action);
   virtual ~CustomDrag();
 
   virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
                              GtkSelectionData* selection_data,
                              guint target_type, guint time) = 0;
 
  private:
   CHROMEGTK_CALLBACK_1(CustomDrag, void, OnDragBegin, GdkDragContext*);
   CHROMEGTK_CALLBACK_1(CustomDrag, void, OnDragEnd, GdkDragContext*);
 
@@ skipping 61 matching lines @@
                              GtkSelectionData* selection_data,
                              guint target_type, guint time);
 
   Profile* profile_;
   std::vector<const BookmarkNode*> nodes_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkDrag);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_CUSTOM_DRAG_H_