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

third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js

Index: third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
index 8dda1c03c9e7201a14758582b6270fb29aa43e26..371c4e40a6dac754cbe96bdfe9668e5212b5cd39 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
@@ -599,15 +599,16 @@
   }
 
   /**
-   * @param {!Common.Event} event
-   */
-  _longResume(event) {
+   * @return {boolean}
+   */
+  _longResume() {
     var debuggerModel = this._prepareToResume();
     if (!debuggerModel)
-      return;
+      return true;
 
     debuggerModel.skipAllPausesUntilReloadOrTimeout(500);
     debuggerModel.resume();
+    return true;
   }
 
   /**
@@ -684,7 +685,7 @@
 
     var longResumeButton =
         new UI.ToolbarButton(Common.UIString('Resume with all pauses blocked for 500 ms'), 'largeicon-play');
-    longResumeButton.addEventListener(UI.ToolbarButton.Events.Click, this._longResume, this);
+    longResumeButton.addEventListener('click', this._longResume.bind(this), this);
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._togglePauseAction, [longResumeButton], []));
 
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._stepOverAction));