Clean-up inline members of nested classes (chrome/)

chrome/common/extensions/extension_set.h

 // 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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_
 
 #include <iterator>
 #include <map>
 #include <string>
@@ skipping 33 matching lines @@
   typedef std::pair<FilePath, std::string> ExtensionPathAndDefaultLocale;
   typedef std::map<std::string, scoped_refptr<const extensions::Extension> >
       ExtensionMap;
 
   // Iteration over the values of the map (given that it's an ExtensionSet,
   // it should iterate like a set iterator).
   class const_iterator :
       public std::iterator<std::input_iterator_tag,
                            scoped_refptr<const extensions::Extension> > {
    public:
-    const_iterator() {}
-    explicit const_iterator(ExtensionMap::const_iterator it) :
-        it_(it) {}
+    const_iterator();
+    const_iterator(const const_iterator& other);
+    explicit const_iterator(ExtensionMap::const_iterator it);
     const_iterator& operator++() {
       ++it_;
       return *this;
     }
     const scoped_refptr<const extensions::Extension> operator*() {
       return it_->second;
     }
     bool operator!=(const const_iterator& other) { return it_ != other.it_; }
     bool operator==(const const_iterator& other) { return it_ == other.it_; }
 
@@ skipping 67 matching lines @@
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtensionSetTest, ExtensionSet);
 
   ExtensionMap extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSet);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_