Turn webspeech on/off when tab goes fore/background

content/browser/speech/speech_recognition_dispatcher_host.cc

 // Copyright (c) 2012 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 "content/browser/speech/speech_recognition_dispatcher_host.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
@@ skipping 34 matching lines @@
 bool SpeechRecognitionDispatcherHost::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(SpeechRecognitionDispatcherHost, message)
     IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_StartRequest,
                         OnStartRequest)
     IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_AbortRequest,
                         OnAbortRequest)
     IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_StopCaptureRequest,
                         OnStopCaptureRequest)
+    IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_AbortAllRequests,
+                        OnAbortAllRequests)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void SpeechRecognitionDispatcherHost::OverrideThreadForMessage(
     const IPC::Message& message,
     BrowserThread::ID* thread) {
   if (message.type() == SpeechRecognitionHostMsg_StartRequest::ID)
     *thread = BrowserThread::UI;
@@ skipping 92 matching lines @@
                                                      int request_id) {
   int session_id = SpeechRecognitionManager::GetInstance()->GetSession(
       render_process_id_, render_view_id, request_id);
 
   // The renderer might provide an invalid |request_id| if the session was not
   // started as expected, e.g., due to unsatisfied security requirements.
   if (session_id != SpeechRecognitionManager::kSessionIDInvalid)
     SpeechRecognitionManager::GetInstance()->AbortSession(session_id);
 }
 
+void SpeechRecognitionDispatcherHost::OnAbortAllRequests(int render_view_id) {
+  SpeechRecognitionManager::GetInstance()->AbortAllSessionsForRenderView(
+      render_process_id_, render_view_id);
+}
+
 void SpeechRecognitionDispatcherHost::OnStopCaptureRequest(
     int render_view_id, int request_id) {
   int session_id = SpeechRecognitionManager::GetInstance()->GetSession(
       render_process_id_, render_view_id, request_id);
 
   // The renderer might provide an invalid |request_id| if the session was not
   // started as expected, e.g., due to unsatisfied security requirements.
   if (session_id != SpeechRecognitionManager::kSessionIDInvalid) {
     SpeechRecognitionManager::GetInstance()->StopAudioCaptureForSession(
         session_id);
@@ skipping 68 matching lines @@
 void SpeechRecognitionDispatcherHost::OnAudioLevelsChange(int session_id,
                                                           float volume,
                                                           float noise_volume) {
 }
 
 void SpeechRecognitionDispatcherHost::OnEnvironmentEstimationComplete(
     int session_id) {
 }
 
 }  // namespace content