[net/dns] Refactoring of job dispatch in HostResolverImpl in preparation for DnsTransactionFactory.

chrome/browser/net/passive_log_collector.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_PASSIVE_LOG_COLLECTOR_H_
 #define CHROME_BROWSER_NET_PASSIVE_LOG_COLLECTOR_H_
 #pragma once
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 249 matching lines @@
     SpdySessionTracker();
 
    private:
     virtual Action DoAddEntry(const ChromeNetLog::Entry& entry,
                               SourceInfo* out_info) OVERRIDE;
 
     DISALLOW_COPY_AND_ASSIGN(SpdySessionTracker);
   };
 
   // Tracks the log entries for the last seen SOURCE_HOST_RESOLVER_IMPL_REQUEST.
-  class DNSRequestTracker : public SourceTracker {
+  class HostResolverRequestTracker : public SourceTracker {
    public:
     static const size_t kMaxNumSources;
     static const size_t kMaxGraveyardSize;
 
-    DNSRequestTracker();
+    HostResolverRequestTracker();
 
    private:
     virtual Action DoAddEntry(const ChromeNetLog::Entry& entry,
                               SourceInfo* out_info) OVERRIDE;
 
-    DISALLOW_COPY_AND_ASSIGN(DNSRequestTracker);
+    DISALLOW_COPY_AND_ASSIGN(HostResolverRequestTracker);
   };
 
   // Tracks the log entries for the last seen SOURCE_HOST_RESOLVER_IMPL_JOB.
-  class DNSJobTracker : public SourceTracker {
+  class HostResolverJobTracker : public SourceTracker {
    public:
     static const size_t kMaxNumSources;
     static const size_t kMaxGraveyardSize;
 
-    DNSJobTracker();
+    HostResolverJobTracker();
 
    private:
     virtual Action DoAddEntry(const ChromeNetLog::Entry& entry,
                               SourceInfo* out_info) OVERRIDE;
 
-    DISALLOW_COPY_AND_ASSIGN(DNSJobTracker);
+    DISALLOW_COPY_AND_ASSIGN(HostResolverJobTracker);
+  };
+
+  // Tracks the log entries for the last seen
+  // SOURCE_HOST_RESOLVER_IMPL_PROC_TASK.
+  class HostResolverProcTaskTracker : public SourceTracker {
+   public:
+    static const size_t kMaxNumSources;
+    static const size_t kMaxGraveyardSize;
+
+    HostResolverProcTaskTracker();
+
+   private:
+    virtual Action DoAddEntry(const ChromeNetLog::Entry& entry,
+                              SourceInfo* out_info) OVERRIDE;
+
+    DISALLOW_COPY_AND_ASSIGN(HostResolverProcTaskTracker);
   };
 
   // Tracks the log entries for the last seen SOURCE_DISK_CACHE_ENTRY.
   class DiskCacheEntryTracker : public SourceTracker {
    public:
     static const size_t kMaxNumSources;
     static const size_t kMaxGraveyardSize;
 
     DiskCacheEntryTracker();
 
@@ skipping 149 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(PassiveLogCollectorTest,
                            HoldReferenceToDeletedSource);
 
   GlobalSourceTracker global_source_tracker_;
   ConnectJobTracker connect_job_tracker_;
   SocketTracker socket_tracker_;
   RequestTracker url_request_tracker_;
   RequestTracker socket_stream_tracker_;
   ProxyScriptDeciderTracker proxy_script_decider_tracker_;
   SpdySessionTracker spdy_session_tracker_;
-  DNSRequestTracker dns_request_tracker_;
-  DNSJobTracker dns_job_tracker_;
+  HostResolverRequestTracker dns_request_tracker_;
+  HostResolverJobTracker dns_job_tracker_;
+  HostResolverProcTaskTracker dns_proc_task_tracker_;
   DiskCacheEntryTracker disk_cache_entry_tracker_;
   MemCacheEntryTracker mem_cache_entry_tracker_;
   HttpStreamJobTracker http_stream_job_tracker_;
   ExponentialBackoffThrottlingTracker exponential_backoff_throttling_tracker_;
   DnsTransactionTracker dns_transaction_tracker_;
   AsyncHostResolverRequestTracker async_host_resolver_request_tracker_;
   UDPSocketTracker udp_socket_tracker_;
   CertVerifierJobTracker cert_verifier_job_tracker_;
   HttpPipelinedConnectionTracker http_pipelined_connection_tracker_;
 
   // This array maps each NetLog::SourceType to one of the tracker instances
   // defined above. Use of this array avoid duplicating the list of trackers
   // elsewhere.
   SourceTrackerInterface* trackers_[net::NetLog::SOURCE_COUNT];
 
   // The count of how many events have flowed through this log. Used to set the
   // "order" field on captured events.
   uint32 num_events_seen_;
 
   DISALLOW_COPY_AND_ASSIGN(PassiveLogCollector);
 };
 
 #endif  // CHROME_BROWSER_NET_PASSIVE_LOG_COLLECTOR_H_