Remove ContextClient from DOMWindowCrypto

third_party/WebKit/Source/modules/crypto/DOMWindowCrypto.cpp

 /*
  * Copyright (C) 2013 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 18 matching lines @@
  */
 
 #include "modules/crypto/DOMWindowCrypto.h"
 
 #include "core/frame/LocalDOMWindow.h"
 #include "modules/crypto/Crypto.h"
 
 namespace blink {
 
 DOMWindowCrypto::DOMWindowCrypto(LocalDOMWindow& window)
-    : ContextClient(window.frame()) {}
+    : Supplement<LocalDOMWindow>(window) {}
 
 const char* DOMWindowCrypto::supplementName() {
   return "DOMWindowCrypto";
 }
 
 DOMWindowCrypto& DOMWindowCrypto::from(LocalDOMWindow& window) {
   DOMWindowCrypto* supplement = static_cast<DOMWindowCrypto*>(
       Supplement<LocalDOMWindow>::from(window, supplementName()));
   if (!supplement) {
     supplement = new DOMWindowCrypto(window);
     provideTo(window, supplementName(), supplement);
   }
   return *supplement;
 }
 
 Crypto* DOMWindowCrypto::crypto(DOMWindow& window) {
   return DOMWindowCrypto::from(toLocalDOMWindow(window)).crypto();
 }
 
 Crypto* DOMWindowCrypto::crypto() const {
-  if (!m_crypto && frame())

[haraken, 2017/01/06 01:40:38]

This check won't make much sense. Removed.

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