Remove the AudioManager singleton.

content/browser/speech/speech_input_manager.cc

Index: content/browser/speech/speech_input_manager.cc
===================================================================
--- content/browser/speech/speech_input_manager.cc	(revision 113173)
+++ content/browser/speech/speech_input_manager.cc	(working copy)
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
+#include "content/browser/resource_context.h"
 #include "content/browser/speech/speech_input_preferences.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/view_type.h"
@@ -26,7 +27,8 @@
                     const std::string& grammar,
                     const std::string& origin_url,
                     net::URLRequestContextGetter* context_getter,
-                    SpeechInputPreferences* speech_input_prefs)
+                    SpeechInputPreferences* speech_input_prefs,
+                    AudioManager* audio_manager)
       : delegate(delegate),
         caller_id(caller_id),
         render_process_id(render_process_id),
@@ -36,7 +38,8 @@
         grammar(grammar),
         origin_url(origin_url),
         context_getter(context_getter),
-        speech_input_prefs(speech_input_prefs) {
+        speech_input_prefs(speech_input_prefs),
+        audio_manager_(audio_manager) {
   }
 
   Delegate* delegate;
@@ -49,6 +52,7 @@
   std::string origin_url;
   net::URLRequestContextGetter* context_getter;
   SpeechInputPreferences* speech_input_prefs;
+  scoped_refptr<AudioManager> audio_manager_;
 };
 
 SpeechInputManager::SpeechInputManager()
@@ -70,21 +74,36 @@
   return requests_.find(caller_id)->second.delegate;
 }
 
-void SpeechInputManager::ShowAudioInputSettings() {
+// static
+void SpeechInputManager::ShowAudioInputSettings(AudioManager* audio_manager) {
   // Since AudioManager::ShowAudioInputSettings can potentially launch external
   // processes, do that in the FILE thread to not block the calling threads.
   if (!BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
     BrowserThread::PostTask(
         BrowserThread::FILE, FROM_HERE,
-        base::Bind(&SpeechInputManager::ShowAudioInputSettings));
+        base::Bind(&SpeechInputManager::ShowAudioInputSettings,
+                   base::Unretained(audio_manager)));
     return;
   }
 
-  DCHECK(AudioManager::GetAudioManager()->CanShowAudioInputSettings());
-  if (AudioManager::GetAudioManager()->CanShowAudioInputSettings())
-    AudioManager::GetAudioManager()->ShowAudioInputSettings();
+  DCHECK(audio_manager->CanShowAudioInputSettings());
+  if (audio_manager->CanShowAudioInputSettings())
+    audio_manager->ShowAudioInputSettings();
 }
 
+// static
+void SpeechInputManager::ShowAudioInputSettingsFromUI(
+    const content::ResourceContext* resource_context) {
+  if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
+    BrowserThread::PostTask(
+        BrowserThread::IO, FROM_HERE,
+        base::Bind(&SpeechInputManager::ShowAudioInputSettingsFromUI,
+                   base::Unretained(resource_context)));
+    return;
+  }
+  ShowAudioInputSettings(resource_context->audio_manager());
+}
+
 void SpeechInputManager::StartRecognition(
     SpeechInputManagerDelegate* delegate,
     int caller_id,
@@ -95,14 +114,15 @@
     const std::string& grammar,
     const std::string& origin_url,
     net::URLRequestContextGetter* context_getter,
-    SpeechInputPreferences* speech_input_prefs) {
+    SpeechInputPreferences* speech_input_prefs,
+    AudioManager* audio_manager) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&SpeechInputManager::CheckRenderViewTypeAndStartRecognition,
       base::Unretained(this), SpeechInputParams(delegate, caller_id,
       render_process_id, render_view_id, element_rect, language, grammar,
-      origin_url, context_getter, speech_input_prefs)));
+      origin_url, context_getter, speech_input_prefs, audio_manager)));
 }
 
 void SpeechInputManager::CheckRenderViewTypeAndStartRecognition(
@@ -137,13 +157,15 @@
   ShowRecognitionRequested(
       params.caller_id, params.render_process_id, params.render_view_id,
       params.element_rect);
-  GetRequestInfo(&can_report_metrics_, &request_info_);
+  GetRequestInfo(params.audio_manager_, &can_report_metrics_,
+                 &request_info_);
 
   SpeechInputRequest* request = &requests_[params.caller_id];
   request->delegate = params.delegate;
   request->recognizer = new SpeechRecognizer(
       this, params.caller_id, params.language, params.grammar,
-      params.context_getter, params.speech_input_prefs->filter_profanities(),
+      params.context_getter, params.audio_manager_,
+      params.speech_input_prefs->filter_profanities(),
       request_info_, can_report_metrics_ ? params.origin_url : "");
   request->is_active = false;
 
@@ -151,15 +173,20 @@
 }
 
 void SpeechInputManager::StartRecognitionForRequest(int caller_id) {
-  DCHECK(HasPendingRequest(caller_id));
+  SpeechRecognizerMap::iterator request = requests_.find(caller_id);
+  if (request == requests_.end()) {
+    NOTREACHED();
+    return;
+  }
 
   // If we are currently recording audio for another caller, abort that cleanly.
   if (recording_caller_id_)
     CancelRecognitionAndInformDelegate(recording_caller_id_);
 
-  if (!AudioManager::GetAudioManager()->HasAudioInputDevices()) {
+  AudioManager* audio_man = request->second.recognizer->audio_manager();
+  if (!audio_man->HasAudioInputDevices()) {
     ShowMicError(caller_id, kNoDeviceAvailable);
-  } else if (AudioManager::GetAudioManager()->IsRecordingInProcess()) {
+  } else if (audio_man->IsRecordingInProcess()) {
     ShowMicError(caller_id, kDeviceInUse);
   } else {
     recording_caller_id_ = caller_id;