[GTTF] Miscellanous UI tests cleanups:

chrome/test/ui/v8_benchmark_uitest.cc

 // Copyright (c) 2009 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/file_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/values.h"
@@ skipping 22 matching lines @@
     show_window_ = true;
   }
 
   void RunTest() {
     FilePath::StringType start_file(kStartFile);
     FilePath test_path = GetV8BenchmarkDir();
     test_path = test_path.Append(start_file);
     GURL test_url(net::FilePathToFileURL(test_path));
 
     scoped_refptr<TabProxy> tab(GetActiveTab());
+    ASSERT_TRUE(tab.get());
     ASSERT_EQ(AUTOMATION_MSG_NAVIGATION_SUCCESS, tab->NavigateToURL(test_url));
 
     // Wait for the test to finish.
     ASSERT_TRUE(WaitUntilTestCompletes(tab.get(), test_url));
 
     PrintResults(tab.get());
   }
 
  protected:
   bool reference_;  // True if this is a reference build.
@@ skipping 94 matching lines @@
 }
 
 TEST_F(V8BenchmarkReferenceTest, Perf) {
   if (!CommandLine::ForCurrentProcess()->HasSwitch(kRunV8Benchmark))
     return;
 
   RunTest();
 }
 
 }  // namespace