Add command line flag to force all extensions to have a browser action.

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 <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 251 matching lines @@
     SINGLE_VALUE_TYPE(switches::kNaClGdb)
   },
   {
     "extension-apis",  // FLAGS:RECORD_UMA
     IDS_FLAGS_EXPERIMENTAL_EXTENSION_APIS_NAME,
     IDS_FLAGS_EXPERIMENTAL_EXTENSION_APIS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableExperimentalExtensionApis)
   },
   {
+    "browser-actions-for-all",
+    IDS_FLAGS_BROWSER_ACTIONS_FOR_ALL_NAME,
+    IDS_FLAGS_BROWSER_ACTIONS_FOR_ALL_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableBrowserActionsForAll),
+  },
+  {
     "apps-new-install-bubble",
     IDS_FLAGS_APPS_NEW_INSTALL_BUBBLE_NAME,
     IDS_FLAGS_APPS_NEW_INSTALL_BUBBLE_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kAppsNewInstallBubble)
   },
   {
     "disable-hyperlink-auditing",
     IDS_FLAGS_DISABLE_HYPERLINK_AUDITING_NAME,
     IDS_FLAGS_DISABLE_HYPERLINK_AUDITING_DESCRIPTION,
@@ skipping 782 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags