Remove Hung plugin detector

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
@@ skipping 1381 matching lines @@
 const char kDefaultTasksByMimeType[] =
     "filebrowser.tasks.default_by_mime_type";
 
 // Map of default tasks, associated by file suffix.
 const char kDefaultTasksBySuffix[] =
     "filebrowser.tasks.default_by_suffix";
 
 // Extensions which should be opened upon completion.
 const char kDownloadExtensionsToOpen[] = "download.extensions_to_open";
 
-// Integer which specifies the frequency in milliseconds for detecting whether
-// plugin windows are hung.
-const char kHungPluginDetectFrequency[] = "browser.hung_plugin_detect_freq";
-
-// Integer which specifies the timeout value to be used for SendMessageTimeout
-// to detect a hung plugin window.
-const char kPluginMessageResponseTimeout[] =
-    "browser.plugin_message_response_timeout";
-
 // String which represents the dictionary name for our spell-checker.
 // This is an old preference that is being migrated to kSpellCheckDictionaries.
 const char kSpellCheckDictionary[] = "spellcheck.dictionary";
 
 // List of strings representing the dictionary names for our spell-checker.
 const char kSpellCheckDictionaries[] = "spellcheck.dictionaries";
 
 // String which represents whether we use the spelling service.
 const char kSpellCheckUseSpellingService[] = "spellcheck.use_spelling_service";
 
@@ skipping 767 matching lines @@
 const char kMediaRouterEnableCloudServices[] =
     "media_router.cloudservices.enabled";
 #endif  // defined(GOOGLE_CHROME_BUILD)
 // Whether or not the Media Router first run flow has been acknowledged by the
 // user.
 const char kMediaRouterFirstRunFlowAcknowledged[] =
     "media_router.firstrunflow.acknowledged";
 #endif
 
 }  // namespace prefs