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 fc305dd5e414cc5e5ea9690f1f5b449b288b1b78..9e93907ca897da2769d689a34b5c421b7b76b92b 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
@@ -595,15 +595,16 @@
   }
 
   /**
-   * @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;
   }
 
   /**
@@ -680,7 +681,7 @@
 
     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));
@@ -690,7 +691,7 @@
     debugToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._toggleBreakpointsActiveAction));
 
     this._pauseOnExceptionButton = new UI.ToolbarToggle('', 'largeicon-pause-on-exceptions');
-    this._pauseOnExceptionButton.addEventListener(UI.ToolbarButton.Events.Click, this._togglePauseOnExceptions, this);
+    this._pauseOnExceptionButton.addEventListener('click', this._togglePauseOnExceptions, this);
     debugToolbar.appendToolbarItem(this._pauseOnExceptionButton);
 
     debugToolbar.appendSeparator();