Completely remove SSLv3 support.

net/http/http_network_transaction.cc

 // 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 1417 matching lines @@
   read_buf_len_ = 0;
   headers_valid_ = false;
   request_headers_.Clear();
   response_ = HttpResponseInfo();
   establishing_tunnel_ = false;
 }
 
 void HttpNetworkTransaction::RecordSSLFallbackMetrics() {
   // Note: these values are used in histograms, so new values must be appended.
   enum FallbackVersion {
-    FALLBACK_NONE = 0,    // SSL version fallback did not occur.
-    FALLBACK_SSL3 = 1,    // Fell back to SSL 3.0.
+    FALLBACK_NONE = 0,  // SSL version fallback did not occur.
+    // Obsolete: FALLBACK_SSL3 = 1,
     FALLBACK_TLS1 = 2,    // Fell back to TLS 1.0.
     FALLBACK_TLS1_1 = 3,  // Fell back to TLS 1.1.
     FALLBACK_MAX,
   };
 
   FallbackVersion fallback = FALLBACK_NONE;
   if (server_ssl_config_.version_fallback) {
     switch (server_ssl_config_.version_max) {
-      case SSL_PROTOCOL_VERSION_SSL3:
-        fallback = FALLBACK_SSL3;
-        break;
       case SSL_PROTOCOL_VERSION_TLS1:
         fallback = FALLBACK_TLS1;
         break;
       case SSL_PROTOCOL_VERSION_TLS1_1:
         fallback = FALLBACK_TLS1_1;
         break;
       default:
         NOTREACHED();
     }
   }
@@ skipping 161 matching lines @@
   DCHECK(stream_request_);
 
   // Since the transaction can restart with auth credentials, it may create a
   // stream more than once. Accumulate all of the connection attempts across
   // those streams by appending them to the vector:
   for (const auto& attempt : stream_request_->connection_attempts())
     connection_attempts_.push_back(attempt);
 }
 
 }  // namespace net