Remove HTTP pipelining support.

net/http/http_pipelined_host_pool.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_HTTP_HTTP_PIPELINED_HOST_POOL_H_
-#define NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/gtest_prod_util.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "net/http/http_pipelined_host.h"
-#include "net/http/http_pipelined_host_capability.h"
-
-namespace base {
-class Value;
-}
-
-namespace net {
-
-class HostPortPair;
-class HttpPipelinedStream;
-class HttpServerProperties;
-
-// Manages all of the pipelining state for specific host with active pipelined
-// HTTP requests. Manages connection jobs, constructs pipelined streams, and
-// assigns requests to the least loaded pipelined connection.
-class NET_EXPORT_PRIVATE HttpPipelinedHostPool
-    : public HttpPipelinedHost::Delegate {
- public:
-  class Delegate {
-   public:
-    // Called when a HttpPipelinedHost has new capacity. Attempts to allocate
-    // any pending pipeline-capable requests to pipelines.
-    virtual void OnHttpPipelinedHostHasAdditionalCapacity(
-        HttpPipelinedHost* host) = 0;
-  };
-
-  HttpPipelinedHostPool(
-      Delegate* delegate,
-      HttpPipelinedHost::Factory* factory,
-      const base::WeakPtr<HttpServerProperties>& http_server_properties,
-      bool force_pipelining);
-  virtual ~HttpPipelinedHostPool();
-
-  // Returns true if pipelining might work for |key|. Generally, this returns
-  // true, unless |key| is known to have failed pipelining recently.
-  bool IsKeyEligibleForPipelining(const HttpPipelinedHost::Key& key);
-
-  // Constructs a new pipeline on |connection| and returns a new
-  // HttpPipelinedStream that uses it.
-  HttpPipelinedStream* CreateStreamOnNewPipeline(
-      const HttpPipelinedHost::Key& key,
-      ClientSocketHandle* connection,
-      const SSLConfig& used_ssl_config,
-      const ProxyInfo& used_proxy_info,
-      const BoundNetLog& net_log,
-      bool was_npn_negotiated,
-      NextProto protocol_negotiated);
-
-  // Tries to find an existing pipeline with capacity for a new request. If
-  // successful, returns a new stream on that pipeline. Otherwise, returns NULL.
-  HttpPipelinedStream* CreateStreamOnExistingPipeline(
-      const HttpPipelinedHost::Key& key);
-
-  // Returns true if a pipelined connection already exists for |key| and
-  // can accept new requests.
-  bool IsExistingPipelineAvailableForKey(const HttpPipelinedHost::Key& key);
-
-  // Callbacks for HttpPipelinedHost.
-  virtual void OnHostIdle(HttpPipelinedHost* host) OVERRIDE;
-
-  virtual void OnHostHasAdditionalCapacity(HttpPipelinedHost* host) OVERRIDE;
-
-  virtual void OnHostDeterminedCapability(
-      HttpPipelinedHost* host,
-      HttpPipelinedHostCapability capability) OVERRIDE;
-
-  // Creates a Value summary of this pool's |host_map_|. Caller assumes
-  // ownership of the returned Value.
-  base::Value* PipelineInfoToValue() const;
-
- private:
-  typedef std::map<HttpPipelinedHost::Key, HttpPipelinedHost*> HostMap;
-
-  HttpPipelinedHost* GetPipelinedHost(const HttpPipelinedHost::Key& key,
-                                      bool create_if_not_found);
-
-  Delegate* delegate_;
-  scoped_ptr<HttpPipelinedHost::Factory> factory_;
-  HostMap host_map_;
-  const base::WeakPtr<HttpServerProperties> http_server_properties_;
-  bool force_pipelining_;
-
-  DISALLOW_COPY_AND_ASSIGN(HttpPipelinedHostPool);
-};
-
-}  // namespace net
-
-#endif  // NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_