Remove unused max_concurrent_streams_limit_ member.

Remove HttpNetworkSession::Params::spdy_max_concurrent_streams_limit,
SpdySessionPool::max_concurrent_streams_limit_, and
SpdySession::max_concurrent_streams_limit_ members.  Note that
SETTINGS_MAX_CONCURRENT_STREAMS is still limited by kMaxConcurrentStreamLimit,
currently 256.

BUG=481005

Review URL: https://codereview.chromium.org/1112093002

Cr-Commit-Position: refs/heads/master@{#327503}

net/http/http_network_session.cc

@@ -80,7 +80,6 @@ HttpNetworkSession::Params::Params()
       spdy_session_max_recv_window_size(kSpdySessionMaxRecvWindowSize),
       spdy_stream_max_recv_window_size(kSpdyStreamMaxRecvWindowSize),
       spdy_initial_max_concurrent_streams(0),
-      spdy_max_concurrent_streams_limit(0),
       time_func(&base::TimeTicks::Now),
       use_alternate_protocols(false),
       alternative_service_probability_threshold(1),
@@ -156,7 +155,6 @@ HttpNetworkSession::HttpNetworkSession(const Params& params)
                          params.spdy_session_max_recv_window_size,
                          params.spdy_stream_max_recv_window_size,
                          params.spdy_initial_max_concurrent_streams,
-                         params.spdy_max_concurrent_streams_limit,
                          params.time_func,
                          params.trusted_spdy_proxy),
       http_stream_factory_(new HttpStreamFactoryImpl(this, false)),

net/http/http_network_session.h

@@ -96,7 +96,6 @@ class NET_EXPORT HttpNetworkSession
     size_t spdy_session_max_recv_window_size;
     size_t spdy_stream_max_recv_window_size;
     size_t spdy_initial_max_concurrent_streams;
-    size_t spdy_max_concurrent_streams_limit;
     SpdySessionPool::TimeFunc time_func;
     std::string trusted_spdy_proxy;
     // URLs to exclude from forced SPDY.

net/spdy/spdy_session.cc

@@ -615,7 +615,6 @@ SpdySession::SpdySession(
     size_t session_max_recv_window_size,
     size_t stream_max_recv_window_size,
     size_t initial_max_concurrent_streams,
-    size_t max_concurrent_streams_limit,
     TimeFunc time_func,
     const HostPortPair& trusted_spdy_proxy,
     NetLog* net_log)
@@ -640,9 +639,6 @@ SpdySession::SpdySession(
       max_concurrent_streams_(initial_max_concurrent_streams == 0
                                   ? kInitialMaxConcurrentStreams
                                   : initial_max_concurrent_streams),
-      max_concurrent_streams_limit_(max_concurrent_streams_limit == 0
-                                        ? kMaxConcurrentStreamLimit
-                                        : max_concurrent_streams_limit),
       max_concurrent_pushed_streams_(kMaxConcurrentPushedStreams),
       streams_initiated_count_(0),
       streams_pushed_count_(0),

net/spdy/spdy_session.h

@@ -245,7 +245,6 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
               size_t session_max_recv_window_size,
               size_t stream_max_recv_window_size,
               size_t initial_max_concurrent_streams,
-              size_t max_concurrent_streams_limit,
               TimeFunc time_func,
               const HostPortPair& trusted_spdy_proxy,
               NetLog* net_log);
@@ -1064,7 +1063,6 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
 
   // Limits
   size_t max_concurrent_streams_;  // 0 if no limit
-  size_t max_concurrent_streams_limit_;
   size_t max_concurrent_pushed_streams_;
 
   // Some statistics counters for the session.

net/spdy/spdy_session_pool.cc

@@ -39,7 +39,6 @@ SpdySessionPool::SpdySessionPool(
     size_t session_max_recv_window_size,
     size_t stream_max_recv_window_size,
     size_t initial_max_concurrent_streams,
-    size_t max_concurrent_streams_limit,
     SpdySessionPool::TimeFunc time_func,
     const std::string& trusted_spdy_proxy)
     : http_server_properties_(http_server_properties),
@@ -58,7 +57,6 @@ SpdySessionPool::SpdySessionPool(
       session_max_recv_window_size_(session_max_recv_window_size),
       stream_max_recv_window_size_(stream_max_recv_window_size),
       initial_max_concurrent_streams_(initial_max_concurrent_streams),
-      max_concurrent_streams_limit_(max_concurrent_streams_limit),
       time_func_(time_func),
       trusted_spdy_proxy_(HostPortPair::FromString(trusted_spdy_proxy)) {
   DCHECK(default_protocol_ >= kProtoSPDYMinimumVersion &&
@@ -101,9 +99,8 @@ base::WeakPtr<SpdySession> SpdySessionPool::CreateAvailableSessionFromSocket(
       verify_domain_authentication_, enable_sending_initial_data_,
       enable_compression_, enable_ping_based_connection_checking_,
       default_protocol_, session_max_recv_window_size_,
-      stream_max_recv_window_size_, initial_max_concurrent_streams_,
-      max_concurrent_streams_limit_, time_func_, trusted_spdy_proxy_,
-      net_log.net_log()));
+      stream_max_recv_window_size_, initial_max_concurrent_streams_, time_func_,
+      trusted_spdy_proxy_, net_log.net_log()));
 
   new_session->InitializeWithSocket(
       connection.Pass(), this, is_secure, certificate_error_code);

net/spdy/spdy_session_pool.h

@@ -58,7 +58,6 @@ class NET_EXPORT SpdySessionPool
       size_t session_max_recv_window_size,
       size_t stream_max_recv_window_size,
       size_t initial_max_concurrent_streams,
-      size_t max_concurrent_streams_limit,
       SpdySessionPool::TimeFunc time_func,
       const std::string& trusted_spdy_proxy);
   ~SpdySessionPool() override;
@@ -216,7 +215,6 @@ class NET_EXPORT SpdySessionPool
   size_t session_max_recv_window_size_;
   size_t stream_max_recv_window_size_;
   size_t initial_max_concurrent_streams_;
-  size_t max_concurrent_streams_limit_;
   TimeFunc time_func_;
 
   // This SPDY proxy is allowed to push resources from origins that are