Implement native speech recognition for the launcher.

chrome/browser/ui/app_list/app_list_speech_recognizer.h

Index: chrome/browser/ui/app_list/app_list_speech_recognizer.h
diff --git a/chrome/browser/ui/app_list/app_list_speech_recognizer.h b/chrome/browser/ui/app_list/app_list_speech_recognizer.h
new file mode 100644
index 0000000000000000000000000000000000000000..dfda90d3a5e7216a5e8273f5384d39c5cf3c5694
--- /dev/null
+++ b/chrome/browser/ui/app_list/app_list_speech_recognizer.h
@@ -0,0 +1,78 @@
+// 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 CHROME_BROWSER_UI_APP_LIST_APP_LIST_SPEECH_RECOGNIZER_H_
+#define CHROME_BROWSER_UI_APP_LIST_APP_LIST_SPEECH_RECOGNIZER_H_
+
+#include <string>
+
+#include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
+#include "content/public/browser/speech_recognition_event_listener.h"
+#include "net/url_request/url_request_context_getter.h"
+#include "ui/app_list/speech_ui_model_observer.h"

[Lei Zhang, 2014/10/30 05:15:42]

not used?

[Anand Mistry (off Chromium), 2014/10/31 00:50:06]

Used for app_list::SpeechRecognitionState enum.

+
+namespace content {
+struct SpeechRecognitionSessionConfig;

[Lei Zhang, 2014/10/30 05:15:42]

not need?

[Anand Mistry (off Chromium), 2014/10/31 00:50:06]

Done.

+}
+
+namespace app_list {
+
+class StartPageService;
+
+class AppListSpeechRecognizer :

[Lei Zhang, 2014/10/30 05:15:42]

Please write a brief description of what AppListSpeechRecognizer does.

[Lei Zhang, 2014/10/30 05:15:42]

colon goes on the next line.

[Jun Mukai, 2014/10/30 07:08:34]

This is my personal preference, but app_list::AppListSpeechRecognizer sounds a
bit redundant.  Could it be app_list::SpeechRecognizer?

[Anand Mistry (off Chromium), 2014/10/31 00:50:06]

Done.

[Anand Mistry (off Chromium), 2014/10/31 00:50:06]

Done.

+  public base::RefCountedThreadSafe<AppListSpeechRecognizer>,
+  public content::SpeechRecognitionEventListener {
+ public:
+  AppListSpeechRecognizer(StartPageService* start_page_service,
+                          const std::string& locale);
+
+  // Start/stop the speech recognizer.
+  void Start();
+  void Stop();
+
+ protected:
+  // Overidden from content::SpeechRecognitionEventListener:
+  void OnRecognitionStart(int session_id) override;
+  void OnRecognitionEnd(int session_id) override;
+  void OnRecognitionResults(
+      int session_id,
+      const content::SpeechRecognitionResults& results) override;
+  void OnRecognitionError(
+      int session_id, const content::SpeechRecognitionError& error) override;
+  void OnSoundStart(int session_id) override;
+  void OnSoundEnd(int session_id) override;
+  void OnAudioLevelsChange(
+      int session_id, float volume, float noise_volume) override;
+  // Overridden, but unimplemented.
+  void OnEnvironmentEstimationComplete(int session_id) override {}

[Lei Zhang, 2014/10/30 05:15:42]

implementations, even empties ones, should go in the .cc file.

[Anand Mistry (off Chromium), 2014/10/31 00:50:06]

Done.

+  void OnAudioStart(int session_id) override {}
+  void OnAudioEnd(int session_id) override {}
+
+ private:
+  friend class base::RefCountedThreadSafe<AppListSpeechRecognizer>;
+  ~AppListSpeechRecognizer();
+
+  void StartOnIOThread(
+      int render_process_id,
+      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
+  void StopOnIOThread();
+
+  void NotifyRecognitionStateChanged(SpeechRecognitionState new_state);
+
+  void StartSpeechTimeout();
+  void StopSpeechTimeout();
+  void SpeechTimeout();
+
+  StartPageService* start_page_service_;  // Not owned.
+  std::string locale_;
+  base::Timer speech_timeout_;
+  int session_;
+
+  base::WeakPtrFactory<AppListSpeechRecognizer> weak_factory_;
+};

[Lei Zhang, 2014/10/30 05:15:42]

DISALLOW_COPY_AND_ASSIGN

[Anand Mistry (off Chromium), 2014/10/31 00:50:06]

Done.

+
+}  // namespace app_list
+
+#endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_SPEECH_RECOGNIZER_H_