Move DevTools out of ash and turn it to a component.

components/ui_devtools/devtools/ui_element.cc

 // Copyright 2017 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 "ash/devtools/ui_element.h"
+#include "components/ui_devtools/devtools/ui_element.h"
 
 #include <algorithm>
 
-#include "ash/devtools/ui_element_delegate.h"
-#include "ash/devtools/view_element.h"
-#include "ash/devtools/widget_element.h"
-#include "ash/devtools/window_element.h"
+#include "components/ui_devtools/devtools/ui_element_delegate.h"
+#include "components/ui_devtools/devtools/view_element.h"
+#include "components/ui_devtools/devtools/widget_element.h"
+#include "components/ui_devtools/devtools/window_element.h"
 
-namespace ash {
+namespace ui {
 namespace devtools {
 namespace {
 
 static int node_ids = 0;
 
 }  // namespace
 
 UIElement::~UIElement() {
   for (auto* child : children_)
     delete child;
@@ skipping 31 matching lines @@
   children_.erase(iter);
 }
 
 void UIElement::ReorderChild(UIElement* child, int new_index) {
   // Remove |child| out of vector |children_|.
   auto iter = std::find(children_.begin(), children_.end(), child);
   DCHECK(iter != children_.end());
   children_.erase(iter);
 
   // Move child to new position |new_index| in vector |children_|.
-  new_index = std::min(children_.size() - 1, static_cast<size_t>(new_index));
+  new_index = std::min(static_cast<int>(children_.size()) - 1, new_index);
   iter = children_.begin() + new_index;
   children_.insert(iter, child);
   delegate()->OnUIElementReordered(child->parent(), child);
 }
 
 UIElement::UIElement(const UIElementType type,
                      UIElementDelegate* delegate,
                      UIElement* parent)
     : node_id_(++node_ids), type_(type), parent_(parent), delegate_(delegate) {
   delegate_->OnUIElementAdded(0, this);
 }
 
 }  // namespace devtools
-}  // namespace ash
+}  // namespace ui