Extend TwoClientExtensionSettingsSyncTest to test app settings.

chrome/browser/sync/test/integration/apps_helper.cc

Index: chrome/browser/sync/test/integration/apps_helper.cc
diff --git a/chrome/browser/sync/test/integration/apps_helper.cc b/chrome/browser/sync/test/integration/apps_helper.cc
index d9501f50c5f524a76f5474ad5e6f3fef052ddc06..dea553d2b8bfecf4cb79f7b3a6d2503c194ba9dd 100644
--- a/chrome/browser/sync/test/integration/apps_helper.cc
+++ b/chrome/browser/sync/test/integration/apps_helper.cc
@@ -45,6 +45,12 @@ std::string InstallApp(Profile* profile, int index) {
       profile, CreateFakeAppName(index), Extension::TYPE_HOSTED_APP);
 }
 
+std::string InstallAppForAllProfiles(int index) {
+  for (int i = 0; i < test()->num_clients(); ++i)
+    InstallApp(test()->GetProfile(i), index);
+  return InstallApp(test()->verifier(), index);
+}
+
 void UninstallApp(Profile* profile, int index) {
   return SyncExtensionHelper::GetInstance()->UninstallExtension(
       profile, CreateFakeAppName(index));