DevTools: track more elements panel user actions

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

 // 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.
 /**
  * @unrestricted
  */
 Emulation.DeviceModeWrapper = class extends UI.VBox {
   /**
    * @param {!Emulation.InspectedPagePlaceholder} inspectedPagePlaceholder
    */
   constructor(inspectedPagePlaceholder) {
     super();
     Emulation.DeviceModeView._wrapperInstance = this;
     this._inspectedPagePlaceholder = inspectedPagePlaceholder;
     /** @type {?Emulation.DeviceModeView} */
     this._deviceModeView = null;
     this._toggleDeviceModeAction = UI.actionRegistry.action('emulation.toggle-device-mode');
     this._showDeviceModeSetting = Common.settings.createSetting('emulation.showDeviceMode', false);
     this._showDeviceModeSetting.addChangeListener(this._update.bind(this, false));
     this._update(true);
   }
 
   _toggleDeviceMode() {
     this._showDeviceModeSetting.set(!this._showDeviceModeSetting.get());
+    if (this._showDeviceModeSetting.get())
+      Host.userMetrics.actionTaken(Host.UserMetrics.Action.DeviceModeToggleOn);

[pfeldman, 2017/02/07 19:15:27]

Wait, we had that, where did it go?

+    else
+      Host.userMetrics.actionTaken(Host.UserMetrics.Action.DeviceModeToggleOff);
   }
 
   /**
    * @return {boolean}
    */
   _captureScreenshot() {
     if (!this._deviceModeView)
       return false;
     this._deviceModeView.captureScreenshot();
     return true;
@@ skipping 44 matching lines @@
       if (actionId === 'emulation.toggle-device-mode') {
         Emulation.DeviceModeView._wrapperInstance._toggleDeviceMode();
         return true;
       }
       if (actionId === 'emulation.capture-screenshot')
         return Emulation.DeviceModeView._wrapperInstance._captureScreenshot();
     }
     return false;
   }
 };