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

net/tools/flip_server/balsa_headers.h

 // Copyright (c) 2009 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_TOOLS_FLIP_SERVER_BALSA_HEADERS_H_
 #define NET_TOOLS_FLIP_SERVER_BALSA_HEADERS_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <iterator>
@@ skipping 401 matching lines @@
    public:
     typedef reverse_iterator_base self;
     typedef iterator_base::reference reference;
     typedef iterator_base::pointer pointer;
     using iterator_base::headers_;
     using iterator_base::idx_;
 
     reverse_iterator_base() : iterator_base() {}
 
     // This constructor is no explicit purposely.
-    reverse_iterator_base(const iterator_base& it) :  // NOLINT
+    explicit reverse_iterator_base(const iterator_base& it) :  // NOLINT
         iterator_base(it) {
     }
 
     self& operator=(const iterator_base& it) {
       idx_ = it.idx_;
       headers_ = it.headers_;
       return *this;
     }
 
     self& operator=(const reverse_iterator_base& it) {
@@ skipping 54 matching lines @@
     const_header_lines_iterator(const BalsaHeaders* headers,
                                 HeaderLines::size_type index) :
         iterator_base(headers, index) {}
   };
 
   class const_reverse_header_lines_iterator : public reverse_iterator_base {
    public:
     typedef const_reverse_header_lines_iterator self;
     const_reverse_header_lines_iterator() : reverse_iterator_base() {}
 
-    const_reverse_header_lines_iterator(
+    explicit const_reverse_header_lines_iterator(
       const const_header_lines_iterator& it) :
         reverse_iterator_base(it.headers_, it.idx_) {}
 
     const_reverse_header_lines_iterator(
       const const_reverse_header_lines_iterator& it) :
         reverse_iterator_base(it.headers_, it.idx_) {}
 
     const_header_lines_iterator base() {
       return const_header_lines_iterator(headers_, idx_);
     }
@@ skipping 620 matching lines @@
   size_t end_of_firstline_idx_;
 
   bool transfer_encoding_is_chunked_;
 
   HeaderLines header_lines_;
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_FLIP_SERVER_BALSA_HEADERS_H_