Plugin Power Saver: Replace all "plug-in" with "plugin" for consistency.

chrome/browser/plugins/plugin_metadata.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 "chrome/browser/plugins/plugin_metadata.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
@@ skipping 43 matching lines @@
 }
 
 bool PluginMetadata::HasMimeType(const std::string& mime_type) const {
   return std::find(all_mime_types_.begin(), all_mime_types_.end(), mime_type) !=
       all_mime_types_.end();
 }
 
 bool PluginMetadata::MatchesPlugin(const content::WebPluginInfo& plugin) {
   for (size_t i = 0; i < matching_mime_types_.size(); ++i) {
     // To have a match, every one of the |matching_mime_types_|
-    // must be handled by the plug-in.
+    // must be handled by the plugin.
     size_t j = 0;
     for (; j < plugin.mime_types.size(); ++j) {
       if (plugin.mime_types[j].mime_type == matching_mime_types_[i])
         break;
     }
     if (j == plugin.mime_types.size())
       return false;
   }
 
   return MatchPattern(plugin.name, group_name_matcher_);
@@ skipping 48 matching lines @@
   PluginMetadata* copy = new PluginMetadata(identifier_,
                                             name_,
                                             url_for_display_,
                                             plugin_url_,
                                             help_url_,
                                             group_name_matcher_,
                                             language_);
   copy->versions_ = versions_;
   return make_scoped_ptr(copy);
 }