Remove ContextClient from DOMWindowQuota

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

Index: third_party/WebKit/Source/modules/quota/DOMWindowQuota.cpp
diff --git a/third_party/WebKit/Source/modules/quota/DOMWindowQuota.cpp b/third_party/WebKit/Source/modules/quota/DOMWindowQuota.cpp
index edd1b46d6a559a246164081c5184adff6077c13c..7dd5f7a9458b78fe8cccd7637f34d6901c9e5804 100644
--- a/third_party/WebKit/Source/modules/quota/DOMWindowQuota.cpp
+++ b/third_party/WebKit/Source/modules/quota/DOMWindowQuota.cpp
@@ -38,7 +38,7 @@
 namespace blink {
 
 DOMWindowQuota::DOMWindowQuota(LocalDOMWindow& window)
-    : ContextClient(window.frame()) {}
+    : Supplement<LocalDOMWindow>(window) {}
 
 const char* DOMWindowQuota::supplementName() {
   return "DOMWindowQuota";
@@ -61,7 +61,7 @@ DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo(DOMWindow& window) {
 }
 
 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();
 }
@@ -69,7 +69,6 @@ DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo() const {
 DEFINE_TRACE(DOMWindowQuota) {
   visitor->trace(m_storageInfo);
   Supplement<LocalDOMWindow>::trace(visitor);
-  ContextClient::trace(visitor);
 }
 
 }  // namespace blink