Remove explicit keyword from multi-argument constructors

views/widget/drop_target_gtk.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 VIEWS_WIDGET_DROP_TARGET_GTK_H_
 #define VIEWS_WIDGET_DROP_TARGET_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 #include <set>
@@ skipping 21 matching lines @@
 // ask for data as necessary. Some Views require data before they can determine
 // if the drop is going to be allowed. When such a View is encountered the
 // relevant data is requested from the drag source. When the data is available
 // the target is notified. Similarly if the drop completes and the data has
 // not yet been fetched, it is fetched and the target then notified.
 //
 // When a drop finishes this class calls back to the containing NativeWidgetGtk
 // which results in deleting the DropTargetGtk.
 class DropTargetGtk {
  public:
-  explicit DropTargetGtk(internal::RootView* root_view,
-                         GdkDragContext* context);
+  DropTargetGtk(internal::RootView* root_view, GdkDragContext* context);
   ~DropTargetGtk();
 
   // If a drag and drop is underway and |view| is the current drop target, the
   // drop target is set to null.
   // This is invoked when a View is removed from the RootView to make sure
   // we don't target a view that was removed during dnd.
   void ResetTargetViewIfEquals(View* view);
 
   // Drop methods from Gtk. These are forwarded from the containing
   // NativeWidgetGtk.
@@ skipping 58 matching lines @@
   // helper_.target_view(). The two differ if the view under the mouse requires
   // the data.
   View* pending_view_;
 
   DISALLOW_COPY_AND_ASSIGN(DropTargetGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_DROP_TARGET_GTK_H_