Handle repeated and overlapping (re)starts of mock speechrecognizer.

components/test_runner/mock_web_speech_recognizer.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 COMPONENTS_TEST_RUNNER_MOCK_WEB_SPEECH_RECOGNIZER_H_
 #define COMPONENTS_TEST_RUNNER_MOCK_WEB_SPEECH_RECOGNIZER_H_
 
 #include <deque>
 #include <vector>
 
@@ skipping 53 matching lines @@
    private:
     DISALLOW_COPY_AND_ASSIGN(Task);
   };
 
  private:
   void StartTaskQueue();
   void ClearTaskQueue();
   void PostRunTaskFromQueue();
   void RunTaskFromQueue();
 
+  bool HasPendingNewContextTasks() const;
+
   blink::WebSpeechRecognitionHandle handle_;
   blink::WebSpeechRecognizerClient* client_;
   std::vector<blink::WebString> mock_transcripts_;
   std::vector<float> mock_confidences_;
   bool was_aborted_;
 
   // Queue of tasks to be run.
   std::deque<Task*> task_queue_;
   bool task_queue_running_;
 
   WebTestDelegate* delegate_;
 
   base::WeakPtrFactory<MockWebSpeechRecognizer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MockWebSpeechRecognizer);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_MOCK_WEB_SPEECH_RECOGNIZER_H_