Fix DCHECK() in infobar animation.

chrome/browser/extensions/extension_crash_recovery_browsertest.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/process_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 353 matching lines @@
   }
 
   {
     SCOPED_TRACE("second balloon");
     AcceptNotification(0);
     CheckExtensionConsistency(size_before);
     CheckExtensionConsistency(size_before + 1);
   }
 }
 
-// Occassional crashes. See http://crbug.com75450
-IN_PROC_BROWSER_TEST_F(ExtensionCrashRecoveryTest,
-                       DISABLED_TwoExtensionsOneByOne) {
+IN_PROC_BROWSER_TEST_F(ExtensionCrashRecoveryTest, TwoExtensionsOneByOne) {
   const size_t size_before = GetExtensionService()->extensions()->size();
   LoadTestExtension();
   CrashExtension(size_before);
   ASSERT_EQ(size_before, GetExtensionService()->extensions()->size());
   LoadSecondExtension();
   CrashExtension(size_before);
   ASSERT_EQ(size_before, GetExtensionService()->extensions()->size());
 
   {
     SCOPED_TRACE("first balloon");
@@ skipping 102 matching lines @@
   LoadSecondExtension();
   CrashExtension(size_before);
   ASSERT_EQ(size_before + 1, GetExtensionService()->extensions()->size());
   ASSERT_EQ(crash_size_before + 1,
             GetExtensionService()->terminated_extensions()->size());
 
   GetExtensionService()->UnloadAllExtensions();
   ASSERT_EQ(crash_size_before,
             GetExtensionService()->terminated_extensions()->size());
 }