Add a "--silent" flag to our test suite to disable gtest output. This clears up the test logs when …

base/test/test_suite.h

 // 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.
 
 #ifndef BASE_TEST_TEST_SUITE_H_
 #define BASE_TEST_TEST_SUITE_H_
 #pragma once
 
 // Defines a basic test suite framework for running gtest based tests.  You can
 // instantiate this class in your main function and call its Run method to run
@@ skipping 41 matching lines @@
   void CatchMaybeTests();
 
   void ResetCommandLine();
 
   int Run();
 
   // A command-line flag that makes a test failure always result in a non-zero
   // process exit code.
   static const char kStrictFailureHandling[];
 
+  // A command-line flag that silences all gtest output.
+  static const char kSilent[];
+
  protected:
   // This constructor is only accessible to specialized test suite
   // implementations which need to control the creation of an AtExitManager
   // instance for the duration of the test.
   TestSuite(int argc, char** argv, bool create_at_exit_manager);
 
   // By default fatal log messages (e.g. from DCHECKs) result in error dialogs
   // which gum up buildbots. Use a minimalistic assert handler which just
   // terminates the process.
   static void UnitTestAssertHandler(const std::string& str);
@@ skipping 20 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(TestSuite);
 };
 
 }  // namespace base
 
 // TODO(brettw) remove this. This is a temporary hack to allow WebKit to compile
 // until we can update it to use "base::" (preventing a two-sided patch).
 using base::TestSuite;
 
 #endif  // BASE_TEST_TEST_SUITE_H_