DevTools: [lighthouse] Implement performance metrics filmstrip

third_party/WebKit/Source/devtools/front_end/emulation/AdvancedApp.js

Index: third_party/WebKit/Source/devtools/front_end/emulation/AdvancedApp.js
diff --git a/third_party/WebKit/Source/devtools/front_end/emulation/AdvancedApp.js b/third_party/WebKit/Source/devtools/front_end/emulation/AdvancedApp.js
index be5ba325895f36b88bb204dbcbfe4ee056644757..6fb70c5f163ee929ed5e6c71518e741a455dbc44 100644
--- a/third_party/WebKit/Source/devtools/front_end/emulation/AdvancedApp.js
+++ b/third_party/WebKit/Source/devtools/front_end/emulation/AdvancedApp.js
@@ -33,7 +33,7 @@ Emulation.AdvancedApp = class {
     this._rootSplitWidget.setDefaultFocusedChild(UI.inspectorView);
     UI.inspectorView.setOwnerSplit(this._rootSplitWidget);
 
-    this._inspectedPagePlaceholder = new Emulation.InspectedPagePlaceholder();
+    this._inspectedPagePlaceholder = Emulation.InspectedPagePlaceholder.instance();
     this._inspectedPagePlaceholder.addEventListener(
         Emulation.InspectedPagePlaceholder.Events.Update, this._onSetInspectedPageBounds.bind(this), this);
     this._deviceModeView = new Emulation.DeviceModeWrapper(this._inspectedPagePlaceholder);
@@ -176,9 +176,12 @@ Emulation.AdvancedApp = class {
       return;
     if (!this._inspectedPagePlaceholder.isShowing())
       return;
-    var bounds = /** @type {{x: number, y: number, width: number, height: number}} */ (event.data);
+    var bounds =
+        /** @type {{x: number, y: number, width: number, height: number, force: (boolean|undefined)}} */ (event.data);
+    var force = bounds.force || false;
+    delete bounds.force;
     console.timeStamp('AdvancedApp.setInspectedPageBounds');
-    InspectorFrontendHost.setInspectedPageBounds(bounds);
+    InspectorFrontendHost.setInspectedPageBounds(bounds, force);
   }
 };