Add missing (and remove superfluous) 'explicit' from constructors.

net/http/http_pipelined_host_pool_unittest.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_pipelined_host_pool.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/rand_util.h"
 #include "net/base/ssl_config_service.h"
 #include "net/http/http_pipelined_host.h"
@@ skipping 28 matching lines @@
   MOCK_METHOD5(CreateNewHost, HttpPipelinedHost*(
       HttpPipelinedHost::Delegate* delegate,
       const HttpPipelinedHost::Key& key,
       HttpPipelinedConnection::Factory* factory,
       HttpPipelinedHostCapability capability,
       bool force_pipelining));
 };
 
 class MockHost : public HttpPipelinedHost {
  public:
-  MockHost(const Key& key)
+  explicit MockHost(const Key& key)
       : key_(key) {
   }
 
   MOCK_METHOD6(CreateStreamOnNewPipeline, HttpPipelinedStream*(
       ClientSocketHandle* connection,
       const SSLConfig& used_ssl_config,
       const ProxyInfo& used_proxy_info,
       const BoundNetLog& net_log,
       bool was_npn_negotiated,
       NextProto protocol_negotiated));
@@ skipping 192 matching lines @@
   pool_->OnHostIdle(host1);
   pool_->OnHostIdle(host2);
   pool_->OnHostIdle(host3);
 
   delete host_;  // Must manually delete, because it's never added to |pool_|.
 }
 
 }  // anonymous namespace
 
 }  // namespace net