Fix heapcheck errors

content/browser/streams/stream_context.cc

Index: content/browser/streams/stream_context.cc
diff --git a/content/browser/streams/stream_context.cc b/content/browser/streams/stream_context.cc
index ca77df1722ce3692f489f9474ebd5751bbe41e8a..ef3a79d11a05eb6d3dd07dbb807c1dca750c1b2c 100644
--- a/content/browser/streams/stream_context.cc
+++ b/content/browser/streams/stream_context.cc
@@ -41,4 +41,17 @@ void StreamContext::InitializeOnIOThread() {
 
 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