Revert of [DevTools] Remove methods on Common.Event.

third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js

Index: third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js b/third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js
index 856470cd6d87e2f634799d5dece8875c443e7879..90c5f20f59f5a00d184505483e21a4d1366b676f 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui_lazy/OverviewGrid.js
@@ -110,13 +110,6 @@
   }
 
   /**
-   * @param {?function(!Event):boolean} clickHandler
-   */
-  setClickHandler(clickHandler) {
-    this._window.setClickHandler(clickHandler);
-  }
-
-  /**
    * @param {number} zoomFactor
    * @param {number} referencePoint
    */
@@ -192,13 +185,6 @@
   }
 
   /**
-   * @param {?function(!Event):boolean} clickHandler
-   */
-  setClickHandler(clickHandler) {
-    this._clickHandler = clickHandler;
-  }
-
-  /**
    * @param {!Event} event
    */
   _resizerElementStartDragging(event) {
@@ -254,7 +240,7 @@
     delete this._overviewWindowSelector;
     var clickThreshold = 3;
     if (window.end - window.start < clickThreshold) {
-      if (this._clickHandler && this._clickHandler.call(null, event))
+      if (this.dispatchEventToListeners(UI.OverviewGrid.Events.Click, event))
         return;
       var middle = window.end;
       window.start = Math.max(0, middle - UI.OverviewGrid.MinSelectableSize / 2);
@@ -419,7 +405,8 @@
 
 /** @enum {symbol} */
 UI.OverviewGrid.Events = {
-  WindowChanged: Symbol('WindowChanged')
+  WindowChanged: Symbol('WindowChanged'),
+  Click: Symbol('Click')
 };
 
 /**