Add the option of compressing speech input audio using FLAC.

chrome/browser/speech/speech_recognizer_unittest.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 <vector>
 
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/speech/speech_recognizer.h"
 #include "chrome/common/net/test_url_fetcher_factory.h"
 #include "media/audio/test_audio_input_controller_factory.h"
@@ skipping 20 matching lines @@
         error_(SpeechRecognizer::RECOGNIZER_NO_ERROR),
         volume_(-1.0f) {
     int audio_packet_length_bytes =
         (SpeechRecognizer::kAudioSampleRate *
          SpeechRecognizer::kAudioPacketIntervalMs *
          SpeechRecognizer::kNumAudioChannels *
          SpeechRecognizer::kNumBitsPerAudioSample) / (8 * 1000);
     audio_packet_.resize(audio_packet_length_bytes);
   }
 
-  void StartTest() {
-    EXPECT_TRUE(recognizer_->StartRecording());
-  }
-
   // SpeechRecognizer::Delegate methods.
   virtual void SetRecognitionResult(int caller_id,
                                     bool error,
                                     const SpeechInputResultArray& result) {
     result_received_ = true;
   }
 
   virtual void DidCompleteRecording(int caller_id) {
     recording_complete_ = true;
   }
@@ skipping 239 matching lines @@
   MessageLoop::current()->RunAllPending();
   EXPECT_FLOAT_EQ(0.9f, volume_);
 
   EXPECT_EQ(SpeechRecognizer::RECOGNIZER_NO_ERROR, error_);
   EXPECT_FALSE(recording_complete_);
   EXPECT_FALSE(recognition_complete_);
   recognizer_->CancelRecognition();
 }
 
 }  // namespace speech_input