[DevTools] Consolidate overlay-related functionality in Overlay domain

third_party/WebKit/Source/devtools/front_end/screencast/ScreencastView.js

Index: third_party/WebKit/Source/devtools/front_end/screencast/ScreencastView.js
diff --git a/third_party/WebKit/Source/devtools/front_end/screencast/ScreencastView.js b/third_party/WebKit/Source/devtools/front_end/screencast/ScreencastView.js
index 91bbe6654f3b216d8769f52dfda3f6f7e0a6d52a..0b289e4a8447ead96852e59b2b26265fabdafd85 100644
--- a/third_party/WebKit/Source/devtools/front_end/screencast/ScreencastView.js
+++ b/third_party/WebKit/Source/devtools/front_end/screencast/ScreencastView.js
@@ -28,7 +28,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /**
- * @implements {SDK.DOMNodeHighlighter}
+ * @implements {SDK.OverlayModel.Highlighter}
  * @unrestricted
  */
 Screencast.ScreencastView = class extends UI.VBox {
@@ -39,6 +39,7 @@ Screencast.ScreencastView = class extends UI.VBox {
     super();
     this._screenCaptureModel = screenCaptureModel;
     this._domModel = screenCaptureModel.target().model(SDK.DOMModel);
+    this._overlayModel = screenCaptureModel.target().model(SDK.OverlayModel);
     this._resourceTreeModel = screenCaptureModel.target().model(SDK.ResourceTreeModel);
     this._networkManager = screenCaptureModel.target().model(SDK.NetworkManager);
     this._inputModel = screenCaptureModel.target().model(Screencast.InputModel);
@@ -130,8 +131,8 @@ Screencast.ScreencastView = class extends UI.VBox {
         Math.floor(Math.min(maxImageDimension, dimensions.height)), undefined, this._screencastFrame.bind(this),
         this._screencastVisibilityChanged.bind(this));
     Emulation.MultitargetTouchModel.instance().setCustomTouchEnabled(true);
-    if (this._domModel)
-      this._domModel.setHighlighter(this);
+    if (this._overlayModel)
+      this._overlayModel.setHighlighter(this);
   }
 
   _stopCasting() {
@@ -140,8 +141,8 @@ Screencast.ScreencastView = class extends UI.VBox {
     this._isCasting = false;
     this._screenCaptureModel.stopScreencast();
     Emulation.MultitargetTouchModel.instance().setCustomTouchEnabled(false);
-    if (this._domModel)
-      this._domModel.setHighlighter(null);
+    if (this._overlayModel)
+      this._overlayModel.setHighlighter(null);
   }
 
   /**
@@ -245,7 +246,7 @@ Screencast.ScreencastView = class extends UI.VBox {
         return;
       if (event.type === 'mousemove') {
         this.highlightDOMNode(node, this._inspectModeConfig);
-        this._domModel.nodeHighlightRequested(node.id);
+        this._domModel.overlayModel().nodeHighlightRequested(node.id);
       } else if (event.type === 'click') {
         Common.Revealer.reveal(node);
       }
@@ -316,7 +317,7 @@ Screencast.ScreencastView = class extends UI.VBox {
   /**
    * @override
    * @param {?SDK.DOMNode} node
-   * @param {?Protocol.DOM.HighlightConfig} config
+   * @param {?Protocol.Overlay.HighlightConfig} config
    * @param {!Protocol.DOM.BackendNodeId=} backendNodeId
    * @param {!Protocol.Runtime.RemoteObjectId=} objectId
    */
@@ -569,14 +570,13 @@ Screencast.ScreencastView = class extends UI.VBox {
 
   /**
    * @override
-   * @param {!Protocol.DOM.InspectMode} mode
-   * @param {!Protocol.DOM.HighlightConfig} config
-   * @param {function(?Protocol.Error)=} callback
+   * @param {!Protocol.Overlay.InspectMode} mode
+   * @param {!Protocol.Overlay.HighlightConfig} config
+   * @return {!Promise}
    */
-  setInspectMode(mode, config, callback) {
+  setInspectMode(mode, config) {
     this._inspectModeConfig = mode !== Protocol.DOM.InspectMode.None ? config : null;
-    if (callback)
-      callback(null);
+    return Promise.resolve();
   }
 
   /**