Server push cancellation: add metrics collection for

net/spdy/spdy_session.h

Index: net/spdy/spdy_session.h
diff --git a/net/spdy/spdy_session.h b/net/spdy/spdy_session.h
index 9d17aaec5e23c07e381d8e595cde379dbe0c9455..af2ff0cd29f30c328afd64a36c2d44e6396ec47c 100644
--- a/net/spdy/spdy_session.h
+++ b/net/spdy/spdy_session.h
@@ -572,6 +572,7 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
   FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, FailedPing);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, GetActivePushStream);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, DeleteExpiredPushStreams);
+  FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, MetricsCollectionOnPushStreams);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, ProtocolNegotiation);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, ClearSettings);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionTest, AdjustRecvWindowSize);
@@ -1051,6 +1052,12 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
   // concurrency limits.
   size_t num_active_pushed_streams_;
 
+  // Number of bytes that has been pushed by the server.
+  uint64_t bytes_pushed_count_;
+
+  // Number of bytes that has been pushed by the server but never claimed.
+  uint64_t bytes_pushed_and_unclaimed_count_;
+
   // The write queue.
   SpdyWriteQueue write_queue_;