Migrate WTF::HashSet::add() to ::insert() [part 1 of N]

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 755 matching lines @@
   }
 
   CanvasAsyncBlobCreator* asyncCreator = CanvasAsyncBlobCreator::create(
       imageData->data(), encodingMimeType, imageData->size(), callback,
       startTime, &document());
 
   asyncCreator->scheduleAsyncBlobCreation(quality);
 }
 
 void HTMLCanvasElement::addListener(CanvasDrawListener* listener) {
-  m_listeners.add(listener);
+  m_listeners.insert(listener);
 }
 
 void HTMLCanvasElement::removeListener(CanvasDrawListener* listener) {
   m_listeners.remove(listener);
 }
 
 SecurityOrigin* HTMLCanvasElement::getSecurityOrigin() const {
   return document().getSecurityOrigin();
 }
 
@@ skipping 639 matching lines @@
   m_surfaceLayerBridge = WTF::wrapUnique(new CanvasSurfaceLayerBridge(this));
   // Creates a placeholder layer first before Surface is created.
   m_surfaceLayerBridge->createSolidColorLayer();
 }
 
 void HTMLCanvasElement::OnWebLayerReplaced() {
   setNeedsCompositingUpdate();
 }
 
 }  // namespace blink