DevTools test harness: add logToStderr method on testRunner.

content/shell/renderer/test_runner/test_runner.h

 // Copyright 2014 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 CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_RUNNER_H_
 #define CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_RUNNER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 158 matching lines @@
   };
 
   ///////////////////////////////////////////////////////////////////////////
   // Methods dealing with the test logic
 
   // By default, tests end when page load is complete. These methods are used
   // to delay the completion of the test until notifyDone is called.
   void NotifyDone();
   void WaitUntilDone();
 
+  // Log to stderr, so the logging doesn't skew the normal test output.
+  void LogToStderr(const std::string& script);
+
   // Methods for adding actions to the work queue. Used in conjunction with
   // waitUntilDone/notifyDone above.
   void QueueBackNavigation(int how_far_back);
   void QueueForwardNavigation(int how_far_forward);
   void QueueReload();
   void QueueLoadingScript(const std::string& script);
   void QueueNonLoadingScript(const std::string& script);
   void QueueLoad(const std::string& url, const std::string& target);
   void QueueLoadHTMLString(gin::Arguments* args);
 
@@ skipping 520 matching lines @@
   bool use_mock_theme_;
 
   base::WeakPtrFactory<TestRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestRunner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_RUNNER_H_