Remove HTTP pipelining support.

chrome/browser/net/http_pipelining_compatibility_client.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 CHROME_BROWSER_NET_HTTP_PIPELINING_COMPATIBILITY_CLIENT_H_
-#define CHROME_BROWSER_NET_HTTP_PIPELINING_COMPATIBILITY_CLIENT_H_
-
-#include <string>
-#include <vector>
-
-#include "base/memory/scoped_vector.h"
-#include "net/base/completion_callback.h"
-#include "net/base/io_buffer.h"
-#include "net/url_request/url_request.h"
-#include "net/url_request/url_request_context.h"
-
-class IOThread;
-
-namespace chrome_browser_net {
-
-struct RequestInfo {
-  std::string filename;  // The path relative to the test server's base_url.
-  std::string expected_response;  // The expected body of the response.
-};
-
-namespace internal {
-
-class PipelineTestRequest {
- public:
-  enum Status {
-    STATUS_SUCCESS,
-    STATUS_REDIRECTED,         // Response was redirected. We won't follow.
-    STATUS_CERT_ERROR,         // Any certificate problem.
-    STATUS_BAD_RESPONSE_CODE,  // Any non-200 response.
-    STATUS_NETWORK_ERROR,      // Any socket error reported by the network
-                               // layer.
-    STATUS_TOO_LARGE,          // The response matched, but had extra data on
-                               // the end.
-    STATUS_TOO_SMALL,          // The response was shorter than expected, but
-                               // what we got matched.
-    STATUS_CONTENT_MISMATCH,   // The response didn't match the expected value.
-    STATUS_BAD_HTTP_VERSION,   // Any version older than HTTP/1.1.
-    STATUS_CORRUPT_STATS,      // The stats.txt response was corrupt.
-    STATUS_MAX,
-  };
-
-  enum Type {
-    TYPE_PIPELINED,  // Pipelined test requests.
-    TYPE_CANARY,     // A non-pipelined request to verify basic HTTP
-                     // connectivity.
-    TYPE_STATS,      // Collects stats from the test server.
-  };
-
-  class Delegate {
-   public:
-    virtual ~Delegate() {}
-
-    // Called when the canary request completes.
-    virtual void OnCanaryFinished(Status status) = 0;
-
-    // Called when a Request determines its result. Reports to UMA.
-    virtual void OnRequestFinished(int request_id, Status status) = 0;
-
-    // Called when a Request encounters a network error. Reports to UMA.
-    virtual void ReportNetworkError(int request_id, int error_code) = 0;
-
-    // Called when a Request determines its HTTP response code. Reports to UMA.
-    virtual void ReportResponseCode(int request_id, int response_code) = 0;
-  };
-
-  class Factory {
-   public:
-    virtual ~Factory() {}
-
-    virtual PipelineTestRequest* NewRequest(
-        int request_id,
-        const std::string& base_url,
-        const RequestInfo& info,
-        Delegate* delegate,
-        net::URLRequestContext* url_request_context,
-        Type type) = 0;
-  };
-
-  virtual ~PipelineTestRequest() {}
-
-  virtual void Start() = 0;
-};
-
-PipelineTestRequest::Status ProcessStatsResponse(
-    const std::string& response);
-
-}  // namespace internal
-
-// Class for performing a background test of users' Internet connections.
-// Fetches a collection of resources on a test server and verifies all were
-// received correctly. This will be used to determine whether or not proxies are
-// interfering with a user's ability to use HTTP pipelining. Results are
-// recorded with UMA.
-class HttpPipeliningCompatibilityClient
-    : public internal::PipelineTestRequest::Delegate {
- public:
-  enum Options {
-    PIPE_TEST_DEFAULTS,              // Only run the |requests| passed to Start.
-    PIPE_TEST_RUN_CANARY_REQUEST,    // Also perform a canary request before
-                                     // testing pipelining.
-    PIPE_TEST_COLLECT_SERVER_STATS,  // Also request stats from the server after
-                                     // the pipeline test completes.
-    PIPE_TEST_CANARY_AND_STATS,      // Both of the above.
-  };
-
-  HttpPipeliningCompatibilityClient(
-      internal::PipelineTestRequest::Factory* factory);
-  virtual ~HttpPipeliningCompatibilityClient();
-
-  // Launches the asynchronous URLRequests to fetch the URLs specified by
-  // |requests| combined with |base_url|. |base_url| should match the pattern
-  // "http://host/". |callback| is invoked once all the requests have completed.
-  // URLRequests are initiated in |url_request_context|. Results are recorded to
-  // UMA as they are received. If |collect_server_stats| is true, also collects
-  // pipelining information recorded by the server.
-  void Start(const std::string& base_url,
-             std::vector<RequestInfo>& requests,
-             Options options,
-             const net::CompletionCallback& callback,
-             net::URLRequestContext* url_request_context);
-
- private:
-  // Sends the pipelining test requests.
-  void StartTestRequests();
-
-  // Returns the full UMA metric name based on |request_id| and |description|.
-  std::string GetMetricName(int request_id, const char* description);
-
-  // PipelineTestRequest::Delegate interface.
-  virtual void OnCanaryFinished(
-      internal::PipelineTestRequest::Status status) OVERRIDE;
-  virtual void OnRequestFinished(
-      int request_id,
-      internal::PipelineTestRequest::Status status) OVERRIDE;
-  virtual void ReportNetworkError(int request_id, int error_code) OVERRIDE;
-  virtual void ReportResponseCode(int request_id, int response_code) OVERRIDE;
-
-  scoped_ptr<net::HttpTransactionFactory> http_transaction_factory_;
-  scoped_ptr<net::URLRequestContext> url_request_context_;
-  scoped_ptr<internal::PipelineTestRequest::Factory> factory_;
-  ScopedVector<internal::PipelineTestRequest> requests_;
-  scoped_ptr<internal::PipelineTestRequest> canary_request_;
-  net::CompletionCallback finished_callback_;
-  size_t num_finished_;
-  size_t num_succeeded_;
-};
-
-void CollectPipeliningCapabilityStatsOnUIThread(
-    const std::string& pipeline_test_server, IOThread* io_thread);
-
-}  // namespace chrome_browser_net
-
-#endif  // CHROME_BROWSER_NET_HTTP_PIPELINING_COMPATIBILITY_CLIENT_H_