views: Simplify View::RemoveAllChildViews() function implementation.

views/view.cc

 // 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.
 
 #include "views/view.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 169 matching lines @@
 #if defined(COMPOSITOR_2)
   view->MarkTextureDirty();
 #endif
 }
 
 void View::RemoveChildView(View* view) {
   DoRemoveChildView(view, true, true, false);
 }
 
 void View::RemoveAllChildViews(bool delete_children) {
-  Views::iterator iter;
-  while ((iter = children_.begin()) != children_.end())
-    DoRemoveChildView(*iter, false, false, delete_children);
+  while (!children_.empty())
+    DoRemoveChildView(children_.front(), false, false, delete_children);
   UpdateTooltip();
 }
 
 const View* View::GetChildViewAt(int index) const {
   return index < child_count() ? children_[index] : NULL;
 }
 
 View* View::GetChildViewAt(int index) {
   return
       const_cast<View*>(const_cast<const View*>(this)->GetChildViewAt(index));
@@ skipping 1699 matching lines @@
     result.append(GetChildViewAt(i)->PrintViewGraph(false));
 
   if (first)
     result.append("}\n");
 
   return result;
 }
 #endif
 
 }  // namespace views