Consolidate volume control code.

chrome/browser/ui/ash/volume_controller_chromeos.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 "chrome/browser/ui/ash/volume_controller_chromeos.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/audio/audio_handler.h"
 #include "chrome/browser/extensions/system/system_api.h"
 #include "content/public/browser/user_metrics.h"
@@ skipping 49 matching lines @@
       audio_handler->AdjustVolumeByPercent(kStepPercentage);
   } else {
     audio_handler->AdjustVolumeByPercent(kStepPercentage);
   }
 
   extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
                                          audio_handler->IsMuted());
   return true;
 }
 
+bool VolumeController::IsAudioMuted() const {
+  return chromeos::AudioHandler::GetInstance()->IsMuted();
+}
+
+void VolumeController::SetAudioMuted(bool muted) {
+  chromeos::AudioHandler::GetInstance()->SetMuted(muted);
+}
+
+// Gets the volume level. The range is [0, 1.0].
+float VolumeController::GetVolumeLevel() const {
+  return chromeos::AudioHandler::GetInstance()->GetVolumePercent() / 100.f;
+}
+
+// Sets the volume level. The range is [0, 1.0].
+void VolumeController::SetVolumeLevel(float level) {
+  chromeos::AudioHandler::GetInstance()->SetVolumePercent(level * 100.f);
+}
+
 void VolumeController::SetVolumePercent(double percent) {
   chromeos::AudioHandler* audio_handler = chromeos::AudioHandler::GetInstance();
   audio_handler->SetVolumePercent(percent);
   extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
                                          audio_handler->IsMuted());
 }