Add methods in spdy/quic session to get stream id of pushed stream given the request url

net/quic/chromium/quic_chromium_client_session.cc

Index: net/quic/chromium/quic_chromium_client_session.cc
diff --git a/net/quic/chromium/quic_chromium_client_session.cc b/net/quic/chromium/quic_chromium_client_session.cc
index f7a1c65131abda4e1533975f1128977aa73dedc2..b8ecabe9a48ca0a77043e0173420da290a776651 100644
--- a/net/quic/chromium/quic_chromium_client_session.cc
+++ b/net/quic/chromium/quic_chromium_client_session.cc
@@ -666,6 +666,16 @@ int QuicChromiumClientSession::GetNumSentClientHellos() const {
   return crypto_stream_->num_sent_client_hellos();
 }
 
+QuicStreamId QuicChromiumClientSession::GetStreamIdForPush(
+    const GURL& pushed_url) {
+  QuicClientPromisedInfo* promised_info =
+      QuicClientSessionBase::GetPromisedByUrl(pushed_url.spec());
+  if (!promised_info)
+    return 0;
+
+  return promised_info->id();
+}
+
 bool QuicChromiumClientSession::CanPool(const std::string& hostname,
                                         PrivacyMode privacy_mode) const {
   DCHECK(connection()->connected());