Speech refactoring: Reimplemented SpeechRecognitionManagerImpl as a FSM. (CL1.7)

content/browser/speech/input_tag_speech_dispatcher_host.h

Index: content/browser/speech/input_tag_speech_dispatcher_host.h
diff --git a/content/browser/speech/input_tag_speech_dispatcher_host.h b/content/browser/speech/input_tag_speech_dispatcher_host.h
index 95bd252f4baa9169a95e5859824a1704bfbe46cb..6a7358b3764a8c77645f19b16f603e79b6313cef 100644
--- a/content/browser/speech/input_tag_speech_dispatcher_host.h
+++ b/content/browser/speech/input_tag_speech_dispatcher_host.h
@@ -8,6 +8,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_message_filter.h"
+#include "content/public/browser/speech_recognition_event_listener.h"
 #include "net/url_request/url_request_context_getter.h"
 
 struct InputTagSpeechHostMsg_StartRecognition_Params;
@@ -17,32 +18,37 @@ class SpeechRecognitionPreferences;
 struct SpeechRecognitionResult;
 }
 
-namespace media {
-class AudioManager;
-}
-
 namespace speech {
 
 class SpeechRecognitionManagerImpl;
 
 // InputTagSpeechDispatcherHost is a delegate for Speech API messages used by
-// RenderMessageFilter.
-// It's the complement of InputTagSpeechDispatcher (owned by RenderView).
+// RenderMessageFilter. Basically it acts as a proxy, relaying the events coming
+// from the SpeechRecognitionManager to IPC messages (and vice versa).
+// It's the complement of SpeechRecognitionDispatcher (owned by RenderView).
 class CONTENT_EXPORT InputTagSpeechDispatcherHost
-    : public content::BrowserMessageFilter {
+    : public content::BrowserMessageFilter,
+      public content::SpeechRecognitionEventListener {
  public:
-  class Sessions;
-
   InputTagSpeechDispatcherHost(
       int render_process_id,
-      net::URLRequestContextGetter* context_getter,
+      net::URLRequestContextGetter* url_request_context_getter,
       content::SpeechRecognitionPreferences* recognition_preferences);
 
-  // Methods called by SpeechRecognitionManagerImpl.
-  void SetRecognitionResult(int session_id,
-                            const content::SpeechRecognitionResult& result);
-  void DidCompleteRecording(int session_id);
-  void DidCompleteRecognition(int session_id);
+  // SpeechRecognitionEventListener methods.
+  virtual void OnRecognitionStart(int session_id) OVERRIDE;
+  virtual void OnAudioStart(int session_id) OVERRIDE;
+  virtual void OnEnvironmentEstimationComplete(int session_id) OVERRIDE;
+  virtual void OnSoundStart(int session_id) OVERRIDE;
+  virtual void OnSoundEnd(int session_id) OVERRIDE;
+  virtual void OnAudioEnd(int session_id) OVERRIDE;
+  virtual void OnRecognitionEnd(int session_id) OVERRIDE;
+  virtual void OnRecognitionResult(
+      int session_id, const content::SpeechRecognitionResult& result) OVERRIDE;
+  virtual void OnRecognitionError(
+      int session_id, const content::SpeechRecognitionError& error) OVERRIDE;
+  virtual void OnAudioLevelsChange(
+      int session_id, float volume, float noise_volume) OVERRIDE;
 
   // content::BrowserMessageFilter implementation.
   virtual bool OnMessageReceived(const IPC::Message& message,
@@ -66,7 +72,7 @@ class CONTENT_EXPORT InputTagSpeechDispatcherHost
   int render_process_id_;
   bool may_have_pending_requests_;  // Set if we received any speech IPC request
 
-  scoped_refptr<net::URLRequestContextGetter> context_getter_;
+  scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
   scoped_refptr<content::SpeechRecognitionPreferences> recognition_preferences_;
 
   static SpeechRecognitionManagerImpl* manager_;