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

net/http/http_stream_factory_impl_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_stream_factory_impl.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "net/base/mock_cert_verifier.h"
@@ skipping 14 matching lines @@
 #include "net/spdy/spdy_session.h"
 #include "net/spdy/spdy_session_pool.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace {
 
 class MockHttpStreamFactoryImpl : public HttpStreamFactoryImpl {
  public:
-  MockHttpStreamFactoryImpl(HttpNetworkSession* session)
+  explicit MockHttpStreamFactoryImpl(HttpNetworkSession* session)
       : HttpStreamFactoryImpl(session),
         preconnect_done_(false),
         waiting_for_preconnect_(false) {}
 
 
   void WaitForPreconnects() {
     while (!preconnect_done_) {
       waiting_for_preconnect_ = true;
       MessageLoop::current()->Run();
       waiting_for_preconnect_ = false;
@@ skipping 407 matching lines @@
   const ProxyRetryInfoMap& retry_info =
       session->proxy_service()->proxy_retry_info();
   EXPECT_EQ(1u, retry_info.size());
   ProxyRetryInfoMap::const_iterator iter = retry_info.find("bad:99");
   EXPECT_TRUE(iter != retry_info.end());
 }
 
 }  // namespace
 
 }  // namespace net