Add live updates for AshDevToolsCSSAgent

ash/common/devtools/ash_devtools_dom_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 ASH_COMMON_DEVTOOLS_ASH_DEVTOOLS_DOM_AGENT_H_
 #define ASH_COMMON_DEVTOOLS_ASH_DEVTOOLS_DOM_AGENT_H_
 
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window_observer.h"
 #include "base/compiler_specific.h"
+#include "base/observer_list.h"
 #include "components/ui_devtools/DOM.h"
 #include "components/ui_devtools/devtools_base_agent.h"
 #include "ui/views/view.h"
 #include "ui/views/view_observer.h"
 #include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_observer.h"
 #include "ui/views/widget/widget_removals_observer.h"
 
 namespace ash {
 namespace devtools {
 
+class ASH_EXPORT AshDevToolsDOMAgentObserver {
+ public:
+  virtual void OnWindowBoundsChanged(WmWindow* window) {}
+  virtual void OnWidgetBoundsChanged(views::Widget* widget) {}
+  virtual void OnViewBoundsChanged(views::View* view) {}
+};
+
 class ASH_EXPORT AshDevToolsDOMAgent
     : public NON_EXPORTED_BASE(ui::devtools::UiDevToolsBaseAgent<
                                ui::devtools::protocol::DOM::Metainfo>),
       public WmWindowObserver,
+      public views::WidgetObserver,
       public views::WidgetRemovalsObserver,
       public views::ViewObserver {
  public:
   explicit AshDevToolsDOMAgent(ash::WmShell* shell);
   ~AshDevToolsDOMAgent() override;
 
   // DOM::Backend
   ui::devtools::protocol::Response disable() override;
   ui::devtools::protocol::Response getDocument(
       std::unique_ptr<ui::devtools::protocol::DOM::Node>* out_root) override;
 
   // WindowObserver
   void OnWindowTreeChanging(WmWindow* window,
                             const TreeChangeParams& params) override;
   void OnWindowTreeChanged(WmWindow* window,
                            const TreeChangeParams& params) override;
   void OnWindowStackingChanged(WmWindow* window) override;
+  void OnWindowBoundsChanged(WmWindow* window,
+                             const gfx::Rect& old_bounds,
+                             const gfx::Rect& new_bounds) override;
 
   // views::WidgetRemovalsObserver
   void OnWillRemoveView(views::Widget* widget, views::View* view) override;
 
+  // views::WidgetObserver
+  void OnWidgetBoundsChanged(views::Widget* widget,
+                             const gfx::Rect& new_bounds) override;
+
   // views::ViewObserver
   void OnChildViewRemoved(views::View* view, views::View* parent) override;
   void OnChildViewAdded(views::View* view) override;
   void OnChildViewReordered(views::View*) override;
+  void OnViewBoundsChanged(views::View* view) override;
 
   WmWindow* GetWindowFromNodeId(int nodeId);
   views::Widget* GetWidgetFromNodeId(int nodeId);
   views::View* GetViewFromNodeId(int nodeId);
 
   int GetNodeIdFromWindow(WmWindow* window);
   int GetNodeIdFromWidget(views::Widget* widget);
   int GetNodeIdFromView(views::View* view);
 
+  void AddObserver(AshDevToolsDOMAgentObserver* observer);
+  void RemoveObserver(AshDevToolsDOMAgentObserver* observer);
+
  private:
   std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildInitialTree();
   std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForWindow(
       WmWindow* window);
   std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForRootWidget(
       views::Widget* widget);
   std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForView(
       views::View* view);
 
   void AddWindowTree(WmWindow* window);
@@ skipping 30 matching lines @@
   using WidgetToNodeIdMap = std::unordered_map<views::Widget*, int>;
   WidgetToNodeIdMap widget_to_node_id_map_;
   using NodeIdToWidgetMap = std::unordered_map<int, views::Widget*>;
   NodeIdToWidgetMap node_id_to_widget_map_;
 
   using ViewToNodeIdMap = std::unordered_map<views::View*, int>;
   ViewToNodeIdMap view_to_node_id_map_;
   using NodeIdToViewMap = std::unordered_map<int, views::View*>;
   NodeIdToViewMap node_id_to_view_map_;
 
+  base::ObserverList<AshDevToolsDOMAgentObserver> observers_;
+
   DISALLOW_COPY_AND_ASSIGN(AshDevToolsDOMAgent);
 };
 
 }  // namespace devtools
 }  // namespace ash
 
 #endif  // ASH_COMMON_DEVTOOLS_ASH_DEVTOOLS_DOM_AGENT_H_