Remove logging.h from cc files that don't use it.

chrome/views/root_view_drop_target.cc

 // Copyright (c) 2006-2008 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.
 
 #include "chrome/views/root_view_drop_target.h"
 
 #include "base/gfx/point.h"
-#include "base/logging.h"
 #include "chrome/common/drag_drop_types.h"
 #include "chrome/views/root_view.h"
 #include "chrome/views/widget.h"
 
 namespace views {
 
 RootViewDropTarget::RootViewDropTarget(RootView* root_view)
     : BaseDropTarget(root_view->GetWidget()->GetNativeView()),
       root_view_(root_view),
       target_view_(NULL),
@@ skipping 91 matching lines @@
   // drop.
   deepest_view_ = view;
   while (view && view != target_view_ &&
          (!view->IsEnabled() || !view->CanDrop(data))) {
     view = view->GetParent();
   }
   return view;
 }
 
 }  // namespace views