Add test for Chrome install with existing Chrome Frame Multi-install

chrome/test/mini_installer_test/test.cc

 // Copyright (c) 2011 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 "base/command_line.h"
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/installer/util/install_util.h"
 #include "chrome/installer/util/util_constants.h"
@@ skipping 150 matching lines @@
   chrome_sys_installer_->InstallChromeAndChromeFrame(true);
 }
 
 TEST_F(MiniInstallTest, InstallChromeFrameUsingMultiInstallUser) {
   cf_user_installer_->InstallChromeFrameUsingMultiInstall();
 }
 
 TEST_F(MiniInstallTest, InstallChromeFrameUsingMultiInstallSys) {
   cf_sys_installer_->InstallChromeFrameUsingMultiInstall();
 }
+
+TEST_F(MiniInstallTest, InstallChromeWithExistingChromeFrameUser) {
+  cf_user_installer_->InstallChromeFrameUsingMultiInstall();
+  chrome_user_installer_->InstallChromeUsingMultiInstall();
+}
+
+TEST_F(MiniInstallTest, InstallChromeWithExistingChromeFrameSys) {
+  cf_sys_installer_->InstallChromeFrameUsingMultiInstall();
+  chrome_sys_installer_->InstallChromeUsingMultiInstall();
+}
 #endif
 
 TEST_F(MiniInstallTest, InstallMiniInstallerSys) {
   chrome_user_installer_->Install();
 }
 
 #if defined(OS_WIN)
 // http://crbug.com/57157 - Fails on windows.
 #define MAYBE_InstallMiniInstallerUser FLAKY_InstallMiniInstallerUser
 #else
 #define MAYBE_InstallMiniInstallerUser InstallMiniInstallerUser
 #endif
 TEST_F(MiniInstallTest, MAYBE_InstallMiniInstallerUser) {
   chrome_user_installer_->Install();
 }
 
 TEST(GenericInstallTest, MiniInstallTestValidWindowsVersion) {
   // We run the tests on all supported OSes.
   // Make sure the code agrees.
   EXPECT_TRUE(InstallUtil::IsOSSupported());
 }