[DevTools] Remove methods on Common.Event.

third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotProxy.js

Index: third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotProxy.js
diff --git a/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotProxy.js b/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotProxy.js
index a6ab8de1c970306f69cbef685f3f13ff081d8d55..0005305848d3852df5bdc4b39bf68d5e87c084af 100644
--- a/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotProxy.js
+++ b/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotProxy.js
@@ -157,7 +157,7 @@ Profiler.HeapSnapshotWorkerProxy = class extends Common.Object {
         this._previousCallbacks.delete(callId);
     }
     var hasLongRunningCalls = !!this._previousCallbacks.size;
-    this.dispatchEventToListeners('wait', hasLongRunningCalls);
+    this.dispatchEventToListeners(Profiler.HeapSnapshotWorkerProxy.Events.Wait, hasLongRunningCalls);
     for (var callId of this._callbacks.keysArray())
       this._previousCallbacks.add(callId);
   }
@@ -193,6 +193,10 @@ Profiler.HeapSnapshotWorkerProxy = class extends Common.Object {
   }
 };
 
+Profiler.HeapSnapshotWorkerProxy.Events = {
+  Wait: Symbol('Wait')
+};
+
 /**
  * @unrestricted
  */