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

components/ui_devtools/devtools/window_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/window_element.h"
+#include "components/ui_devtools/devtools/window_element.h"
 
-#include "ash/devtools/ui_element_delegate.h"
+#include "components/ui_devtools/devtools/ui_element_delegate.h"
 #include "ui/aura/window.h"
 
-namespace ash {
+namespace ui {
 namespace devtools {
 namespace {
 
 int GetIndexOfChildInParent(aura::Window* window) {
   const aura::Window::Windows& siblings = window->parent()->children();
   auto it = std::find(siblings.begin(), siblings.end(), window);
   DCHECK(it != siblings.end());
   return std::distance(siblings.begin(), it);
 }
 
@@ skipping 69 matching lines @@
   return std::make_pair(window_, window_->GetBoundsInScreen());
 }
 
 // static
 aura::Window* WindowElement::From(UIElement* element) {
   DCHECK_EQ(UIElementType::WINDOW, element->type());
   return static_cast<WindowElement*>(element)->window_;
 }
 
 }  // namespace devtools
-}  // namespace ash
+}  // namespace ui