Fix heapcheck errors

content/browser/streams/stream_context.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/streams/stream_context.h"
 
 #include "base/bind.h"
 #include "content/browser/streams/stream_registry.h"
 #include "content/public/browser/browser_context.h"
 
@@ skipping 23 matching lines @@
   return UserDataAdapter<StreamContext>::Get(context, kStreamContextKeyName);
 }
 
 void StreamContext::InitializeOnIOThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   registry_.reset(new StreamRegistry());
 }
 
 StreamContext::~StreamContext() {}
 
+void StreamContext::DeleteOnCorrectThread() const {
+  // In many tests, there isn't a valid IO thread.  In that case, just delete on
+  // the current thread.
+  // TODO(zork): Remove this custom deleter, and fix the leaks in all the
+  // tests.
+  if (BrowserThread::IsMessageLoopValid(BrowserThread::IO) &&
+      !BrowserThread::CurrentlyOn(BrowserThread::IO)) {
+    BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
+    return;
+  }
+  delete this;
+}
+
 }  // namespace content