QUIC - Added histograms to track how cache ie performing when server

net/http/disk_cache_based_quic_server_info.h

 // Copyright 2014 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_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_
 #define NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 43 matching lines @@
     READ_COMPLETE,
     WAIT_FOR_DATA_READY_DONE,
     CREATE_OR_OPEN,
     CREATE_OR_OPEN_COMPLETE,
     WRITE,
     WRITE_COMPLETE,
     SET_DONE,
     NONE,
   };
 
-  // Enum to track number of times data read/parse/write API calls of
-  // QuicServerInfo to and from disk cache is called.
-  enum QuicServerInfoAPICall {
-    QUIC_SERVER_INFO_START = 0,
-    QUIC_SERVER_INFO_WAIT_FOR_DATA_READY = 1,
-    QUIC_SERVER_INFO_PARSE = 2,
-    QUIC_SERVER_INFO_WAIT_FOR_DATA_READY_CANCEL = 3,
-    QUIC_SERVER_INFO_READY_TO_PERSIST = 4,
-    QUIC_SERVER_INFO_PERSIST = 5,
-    QUIC_SERVER_INFO_EXTERNAL_CACHE_HIT = 6,
-    QUIC_SERVER_INFO_NUM_OF_API_CALLS = 7,
-  };
-
-  // Enum to track failure reasons to read/load/write of QuicServerInfo to
-  // and from disk cache.
-  enum FailureReason {
-    WAIT_FOR_DATA_READY_INVALID_ARGUMENT_FAILURE = 0,
-    GET_BACKEND_FAILURE = 1,
-    OPEN_FAILURE = 2,
-    CREATE_OR_OPEN_FAILURE = 3,
-    PARSE_NO_DATA_FAILURE = 4,
-    PARSE_FAILURE = 5,
-    READ_FAILURE = 6,
-    READY_TO_PERSIST_FAILURE = 7,
-    PERSIST_NO_BACKEND_FAILURE = 8,
-    WRITE_FAILURE = 9,
-    NO_FAILURE = 10,
-    NUM_OF_FAILURES = 11,
-  };
-
   ~DiskCacheBasedQuicServerInfo() override;
 
   // Persists |pending_write_data_| if it is not empty, otherwise serializes the
   // data and pesists it.
   void PersistInternal();
 
   std::string key() const;
 
   // The |unused| parameter is a small hack so that we can have the
   // CacheOperationDataShim object owned by the Callback that is created for
@@ skipping 51 matching lines @@
   FailureReason last_failure_;
 
   base::WeakPtrFactory<DiskCacheBasedQuicServerInfo> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DiskCacheBasedQuicServerInfo);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_