Remove ContextClient from DOMWindowQuota

third_party/WebKit/Source/modules/quota/DOMWindowQuota.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #include "modules/quota/DOMWindowQuota.h"
 
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/quota/DeprecatedStorageInfo.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 DOMWindowQuota::DOMWindowQuota(LocalDOMWindow& window)
-    : ContextClient(window.frame()) {}
+    : Supplement<LocalDOMWindow>(window) {}
 
 const char* DOMWindowQuota::supplementName() {
   return "DOMWindowQuota";
 }
 
 // static
 DOMWindowQuota& DOMWindowQuota::from(LocalDOMWindow& window) {
   DOMWindowQuota* supplement = static_cast<DOMWindowQuota*>(
       Supplement<LocalDOMWindow>::from(window, supplementName()));
   if (!supplement) {
     supplement = new DOMWindowQuota(window);
     provideTo(window, supplementName(), supplement);
   }
   return *supplement;
 }
 
 // static
 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo(DOMWindow& window) {
   return DOMWindowQuota::from(toLocalDOMWindow(window)).webkitStorageInfo();
 }
 
 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo() const {
-  if (!m_storageInfo && frame())

[haraken, 2017/01/06 01:37:22]

I don't think the frame check makes sense, so removed. Given that we're already
returning an already-created DeprecatedStorageInfo after the context is
detached, there will be no reason to not create a new DeprecatedStorageInfo
after the context is detached.

[sof, 2017/01/06 07:25:49]

Yes, same issue as
https://codereview.chromium.org/2617583005/diff/1/third_party/WebKit/Source/m...

+  if (!m_storageInfo)
     m_storageInfo = DeprecatedStorageInfo::create();
   return m_storageInfo.get();
 }
 
 DEFINE_TRACE(DOMWindowQuota) {
   visitor->trace(m_storageInfo);
   Supplement<LocalDOMWindow>::trace(visitor);
-  ContextClient::trace(visitor);
 }
 
 }  // namespace blink