Extend TwoClientExtensionSettingsSyncTest to test app settings.

chrome/browser/sync/test/integration/extensions_helper.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/sync/test/integration/extensions_helper.h"
 
 #include <cstring>
 
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
@@ skipping 36 matching lines @@
   }
   return true;
 }
 
 
 std::string InstallExtension(Profile* profile, int index) {
   return SyncExtensionHelper::GetInstance()->InstallExtension(
       profile, CreateFakeExtensionName(index), Extension::TYPE_EXTENSION);
 }
 
+std::string InstallExtensionForAllProfiles(int index) {
+  for (int i = 0; i < test()->num_clients(); ++i)
+    InstallExtension(test()->GetProfile(i), index);
+  return InstallExtension(test()->verifier(), index);
+}
+
 void UninstallExtension(Profile* profile, int index) {
   return SyncExtensionHelper::GetInstance()->UninstallExtension(
       profile, CreateFakeExtensionName(index));
 }
 
 std::vector<int> GetInstalledExtensions(Profile* profile) {
   std::vector<int> indices;
   std::vector<std::string> names =
       SyncExtensionHelper::GetInstance()->GetInstalledExtensionNames(profile);
   for (std::vector<std::string>::const_iterator it = names.begin();
@@ skipping 49 matching lines @@
   if (!StartsWithASCII(name, extension_name_prefix, true) ||
       !base::StringToInt(name.substr(strlen(extension_name_prefix)), index)) {
     LOG(WARNING) << "Unable to convert extension name \"" << name
                  << "\" to index";
     return false;
   }
   return true;
 }
 
 }  // namespace extensions_helper