Reduce flakiness in chrome_frame_tests.exe by having each run in a clean environment.

chrome_frame/test/run_all_unittests.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 <atlbase.h>
 
 #include "base/command_line.h"
 #include "base/process_util.h"
 #include "base/test/test_suite.h"
 #include "base/threading/platform_thread.h"
 #include "base/win/scoped_com_initializer.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome_frame/crash_server_init.h"
 #include "chrome_frame/test/chrome_frame_test_utils.h"
 #include "chrome_frame/test/chrome_frame_ui_test_utils.h"
+#include "chrome_frame/test/test_scrubber.h"
 #include "chrome_frame/test_utils.h"
 #include "chrome_frame/utils.h"
 
 // To enable ATL-based code to run in this module
 class ChromeFrameUnittestsModule
     : public CAtlExeModuleT<ChromeFrameUnittestsModule> {
  public:
   static HRESULT InitializeCom() {
     // Note that this only gets called in versions of ATL included in
     // VS2008 and earlier. We still need it however since this gets called
@@ skipping 28 matching lines @@
 
   base::ProcessHandle crash_service = NULL;
   google_breakpad::scoped_ptr<google_breakpad::ExceptionHandler> breakpad;
 
   if (!CommandLine::ForCurrentProcess()->HasSwitch(kNoCrashService)) {
     crash_service = chrome_frame_test::StartCrashService();
 
     breakpad.reset(InitializeCrashReporting(HEADLESS));
   }
 
+  chrome_frame_test::InstallTestScrubber(testing::UnitTest::GetInstance());
+
   int ret = -1;
   // If mini_installer is used to register CF, we use the switch
   // --no-registration to avoid repetitive registration.
   if (CommandLine::ForCurrentProcess()->HasSwitch(kNoRegistrationSwitch)) {
     ret = test_suite.Run();
   } else {
     // This will register the chrome frame in the build directory. It currently
     // leaves that chrome frame registered once the tests are done. It must be
     // constructed AFTER the TestSuite is created since TestSuites create THE
     // AtExitManager.
     // TODO(robertshield): Make these tests restore the original registration
     // once done.
     ScopedChromeFrameRegistrar registrar(chrome_frame_test::GetTestBedType());
 
     // Register IAccessible2 proxy stub DLL, needed for some tests.
     ScopedChromeFrameRegistrar ia2_registrar(
         chrome_frame_test::GetIAccessible2ProxyStubPath().value(),
         ScopedChromeFrameRegistrar::SYSTEM_LEVEL);
     ret = test_suite.Run();
   }
 
   DeleteConfigValue(kChromeFrameHeadlessMode);
   DeleteConfigValue(kChromeFrameAccessibleMode);
 
   if (crash_service)
     base::KillProcess(crash_service, 0, false);
   return ret;
 }