Update from https://crrev.com/306655

net/spdy/spdy_session.h

 // Copyright (c) 2012 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.
 
 #ifndef NET_SPDY_SPDY_SESSION_H_
 #define NET_SPDY_SPDY_SESSION_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 493 matching lines @@
   }
 
   size_t GetFrameMaximumSize() const {
     return buffered_spdy_framer_->GetFrameMaximumSize();
   }
 
   size_t GetDataFrameMaximumPayload() const {
     return buffered_spdy_framer_->GetDataFrameMaximumPayload();
   }
 
+  static int32 GetInitialWindowSize(NextProto protocol) {
+    return protocol < kProtoSPDY4MinimumVersion ? 65536 : 65535;
+  }
+
   // https://http2.github.io/http2-spec/#TLSUsage mandates minimum security
   // standards for TLS.
   bool HasAcceptableTransportSecurity() const;
 
   // Must be used only by |pool_|.
   base::WeakPtr<SpdySession> GetWeakPtr();
 
   // HigherLayeredPool implementation:
   bool CloseOneIdleConnection() override;
 
@@ skipping 647 matching lines @@
   // Used for posting asynchronous IO tasks.  We use this even though
   // SpdySession is refcounted because we don't need to keep the SpdySession
   // alive if the last reference is within a RunnableMethod.  Just revoke the
   // method.
   base::WeakPtrFactory<SpdySession> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_H_