Remove unused Flash-related code:

chrome/common/chrome_paths.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_CHROME_PATHS_H__
 #define CHROME_COMMON_CHROME_PATHS_H__
 
 #include "build/build_config.h"
 
 // This file declares path keys for the chrome module.  These can be used with
@@ skipping 54 matching lines @@
                                               // Flash plugins downloaded by the
                                               // component updater.
   FILE_RESOURCE_MODULE,         // Full path and filename of the module that
                                 // contains embedded resources (version,
                                 // strings, images, etc.).
   FILE_LOCAL_STATE,             // Path and filename to the file in which
                                 // machine/installation-specific state is saved.
   FILE_RECORDED_SCRIPT,         // Full path to the script.log file that
                                 // contains recorded browser events for
                                 // playback.
-  FILE_FLASH_PLUGIN,            // Full path to the internal Flash plugin file.
-                                // Querying this path will succeed no matter the
-                                // file exists or not.
-  FILE_FLASH_PLUGIN_EXISTING,   // Full path to the internal Flash plugin file.
-                                // Querying this path will fail if the file
-                                // doesn't exist.
+  FILE_FLASH_PLUGIN,            // Full path to the internal NPAPI Flash plugin

[yzshen1, 2012/12/27 23:10:57]

I will get rid of this one when I remove the prefs migration code. (I have
already got a TODO in plugin_prefs.cc so I didn't add one here.)

+                                // file. Querying this path will succeed no
+                                // matter the file exists or not.
   FILE_PEPPER_FLASH_PLUGIN,     // Full path to the bundled Pepper Flash plugin
                                 // file.
   FILE_PDF_PLUGIN,              // Full path to the internal PDF plugin file.
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   FILE_NACL_HELPER,             // Full path to Linux nacl_helper executable.
   FILE_NACL_HELPER_BOOTSTRAP,   // ... and nacl_helper_bootstrap executable.
 #endif
   FILE_NACL_PLUGIN,             // Full path to the internal NaCl plugin file.
   DIR_PNACL_BASE,               // Full path to the base dir for PNaCl.
@@ skipping 23 matching lines @@
 
   PATH_END
 };
 
 // Call once to register the provider for the path keys defined above.
 void RegisterPathProvider();
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_PATHS_H__