Coverity: Fix a pass-by-value.

chrome/browser/extensions/extension_menu_manager.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/extensions/extension_menu_manager.h"
 
 #include <algorithm>
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 11 matching lines @@
 #include "content/public/common/context_menu_params.h"
 #include "ui/base/text/text_elider.h"
 #include "ui/gfx/favicon_size.h"
 
 using content::WebContents;
 
 namespace {
 
 void SetIdKeyValue(base::DictionaryValue* properties,
                    const char* key,
-                   ExtensionMenuItem::Id id) {
+                   const ExtensionMenuItem::Id& id) {
   if (id.uid == 0)
     properties->SetString(key, id.string_uid);
   else
     properties->SetInteger(key, id.uid);
 }
 
 }  // namespace
 
 ExtensionMenuItem::ExtensionMenuItem(const Id& id,
                                      const std::string& title,
@@ skipping 545 matching lines @@
       return true;
     if (extension_id == other.extension_id) {
       if (uid < other.uid)
         return true;
       if (uid == other.uid)
         return string_uid < other.string_uid;
     }
   }
   return false;
 }