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

components/ui_devtools/views/ui_devtools_css_agent.h

+// Copyright 2016 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 COMPONENTS_UI_DEVTOOLS_VIEWS_UI_DEVTOOLS_CSS_AGENT_H_
+#define COMPONENTS_UI_DEVTOOLS_VIEWS_UI_DEVTOOLS_CSS_AGENT_H_
+
+#include "base/macros.h"
+#include "components/ui_devtools/CSS.h"
+#include "components/ui_devtools/views/ui_devtools_dom_agent.h"
+
+namespace ui_devtools {
+
+class UIDevToolsCSSAgent : public ui_devtools::UiDevToolsBaseAgent<
+                               ui_devtools::protocol::CSS::Metainfo>,
+                           public UIDevToolsDOMAgentObserver {
+ public:
+  explicit UIDevToolsCSSAgent(UIDevToolsDOMAgent* dom_agent);
+  ~UIDevToolsCSSAgent() override;
+
+  // CSS::Backend:
+  ui_devtools::protocol::Response enable() override;
+  ui_devtools::protocol::Response disable() override;
+  ui_devtools::protocol::Response getMatchedStylesForNode(
+      int node_id,
+      ui_devtools::protocol::Maybe<ui_devtools::protocol::CSS::CSSStyle>*
+          inline_style) override;
+  ui_devtools::protocol::Response setStyleTexts(
+      std::unique_ptr<ui_devtools::protocol::Array<
+          ui_devtools::protocol::CSS::StyleDeclarationEdit>> edits,
+      std::unique_ptr<
+          ui_devtools::protocol::Array<ui_devtools::protocol::CSS::CSSStyle>>*
+          result) override;
+
+  // UIDevToolsDOMAgentObserver:
+  void OnNodeBoundsChanged(int node_id) override;
+
+ private:
+  std::unique_ptr<ui_devtools::protocol::CSS::CSSStyle> GetStylesForNode(
+      int node_id);
+  void InvalidateStyleSheet(int node_id);
+  bool GetPropertiesForNodeId(int node_id, gfx::Rect* bounds, bool* visible);
+  bool SetPropertiesForNodeId(int node_id,
+                              const gfx::Rect& bounds,
+                              bool visible);
+  UIDevToolsDOMAgent* dom_agent_;
+
+  DISALLOW_COPY_AND_ASSIGN(UIDevToolsCSSAgent);
+};
+
+}  // namespace ui_devtools
+
+#endif  // COMPONENTS_UI_DEVTOOLS_VIEWS_UI_DEVTOOLS_CSS_AGENT_H_