Add CSS agent for various window/widget/view attributes in devtools

ash/common/devtools/ash_devtools_dom_agent.cc

Index: ash/common/devtools/ash_devtools_dom_agent.cc
diff --git a/ash/common/devtools/ash_devtools_dom_agent.cc b/ash/common/devtools/ash_devtools_dom_agent.cc
index 1741ab306080d8adf40abb8982cca178f815b762..40a1a6cd95267afe6c153eac2b90e08125ef7ece 100644
--- a/ash/common/devtools/ash_devtools_dom_agent.cc
+++ b/ash/common/devtools/ash_devtools_dom_agent.cc
@@ -6,8 +6,6 @@
 
 #include "ash/common/wm_window.h"
 #include "components/ui_devtools/devtools_server.h"
-#include "ui/views/view.h"
-#include "ui/views/widget/widget.h"
 
 namespace ash {
 namespace devtools {
@@ -57,19 +55,6 @@ std::unique_ptr<Array<std::string>> GetAttributes(const views::View* view) {
   return attributes;
 }
 
-std::unique_ptr<DOM::Node> BuildTreeForView(views::View* view) {
-  std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
-  for (int i = 0, count = view->child_count(); i < count; i++) {
-    children->addItem(BuildTreeForView(view->child_at(i)));
-  }
-  return BuildNode("View", GetAttributes(view), std::move(children));
-}
-
-std::unique_ptr<DOM::Node> BuildTreeForRootWidget(views::Widget* widget) {
-  std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
-  children->addItem(BuildTreeForView(widget->GetRootView()));
-  return BuildNode("Widget", GetAttributes(widget), std::move(children));
-}
 
 WmWindow* FindPreviousSibling(WmWindow* window) {
   std::vector<WmWindow*> siblings = window->GetParent()->GetChildren();
@@ -131,6 +116,43 @@ void AshDevToolsDOMAgent::OnWindowStackingChanged(WmWindow* window) {
   AddWindowNode(window);
 }
 
+WmWindow* AshDevToolsDOMAgent::GetWindowFromNodeId(int nodeId) {
+  return node_id_to_window_map_.count(nodeId) ? node_id_to_window_map_[nodeId]
+                                              : nullptr;
+}
+
+views::Widget* AshDevToolsDOMAgent::GetWidgetFromNodeId(int nodeId) {
+  return node_id_to_widget_map_.count(nodeId) ? node_id_to_widget_map_[nodeId]
+                                              : nullptr;
+}
+
+views::View* AshDevToolsDOMAgent::GetViewFromNodeId(int nodeId) {
+  return node_id_to_view_map_.count(nodeId) ? node_id_to_view_map_[nodeId]
+                                            : nullptr;
+}
+
+std::unique_ptr<DOM::Node> AshDevToolsDOMAgent::BuildTreeForView(
+    views::View* view) {
+  std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
+  for (int i = 0, count = view->child_count(); i < count; i++) {
+    children->addItem(BuildTreeForView(view->child_at(i)));
+  }
+  std::unique_ptr<ui::devtools::protocol::DOM::Node> node =
+      BuildNode("View", GetAttributes(view), std::move(children));
+  node_id_to_view_map_[node->getNodeId()] = view;
+  return node;
+}
+
+std::unique_ptr<DOM::Node> AshDevToolsDOMAgent::BuildTreeForRootWidget(
+    views::Widget* widget) {
+  std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
+  children->addItem(BuildTreeForView(widget->GetRootView()));
+  std::unique_ptr<ui::devtools::protocol::DOM::Node> node =
+      BuildNode("Widget", GetAttributes(widget), std::move(children));
+  node_id_to_widget_map_[node->getNodeId()] = widget;
+  return node;
+}
+
 std::unique_ptr<DOM::Node> AshDevToolsDOMAgent::BuildTreeForWindow(
     ash::WmWindow* window) {
   std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
@@ -146,6 +168,7 @@ std::unique_ptr<DOM::Node> AshDevToolsDOMAgent::BuildTreeForWindow(
   if (!window_to_node_id_map_.count(window))
     window->AddObserver(this);
   window_to_node_id_map_[window] = node->getNodeId();
+  node_id_to_window_map_[node->getNodeId()] = window;
   return node;
 }
 
@@ -193,6 +216,9 @@ void AshDevToolsDOMAgent::RemoveObserverFromAllWindows() {
 void AshDevToolsDOMAgent::Reset() {
   RemoveObserverFromAllWindows();
   window_to_node_id_map_.clear();
+  node_id_to_window_map_.clear();
+  node_id_to_widget_map_.clear();
+  node_id_to_view_map_.clear();
   node_ids = 1;
 }