[unpacker] Add a disable flag for the new zip unpacker.

chrome/browser/about_flags.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/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1980 matching lines @@
   },
 #endif
 #if defined(OS_CHROMEOS)
   {
     "enable-remote-assistance",
     IDS_FLAGS_ENABLE_REMOTE_ASSISTANCE_NAME,
     IDS_FLAGS_ENABLE_REMOTE_ASSISTANCE_DESCRIPTION,
     kOsCrOS,
     SINGLE_VALUE_TYPE(extensions::switches::kEnableRemoteAssistance)
   },
+  {
+    "disable-new-zip-unpacker",
+    IDS_FLAGS_DISABLE_NEW_ZIP_UNPACKER_NAME,
+    IDS_FLAGS_DISABLE_NEW_ZIP_UNPACKER_DESCRIPTION,
+    kOsCrOS,
+    SINGLE_VALUE_TYPE(chromeos::switches::kDisableNewZIPUnpacker)
+  }
 #endif  // defined(OS_CHROMEOS)
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in
   // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 const Experiment* experiments = kExperiments;
 size_t num_experiments = arraysize(kExperiments);
 
 // Stores and encapsulates the little state that about:flags has.
@@ skipping 582 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags