Implement two new policies to control muting the audio I/O.

chrome/browser/ui/ash/volume_controller_browsertest_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/chromeos/audio/audio_handler.h"
 #include "chrome/browser/chromeos/audio/audio_mixer.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 16 matching lines @@
   }
 
   virtual void SetVolumePercent(double percent) OVERRIDE {
     volume_ = percent;
   }
 
   virtual bool IsMuted() OVERRIDE {
     return is_muted_;
   }
 
-  virtual void SetMuted(bool do_mute) OVERRIDE {
-    is_muted_ = do_mute;
+  virtual void SetMuted(bool mute) OVERRIDE {
+    is_muted_ = mute;
+  }
+
+  bool IsMuteLocked() OVERRIDE {
+    return is_mute_locked_;
+  }
+
+  void SetMuteLocked(bool locked) OVERRIDE {
+    is_mute_locked_ = locked;
+  }
+
+  bool IsCaptureMuted() OVERRIDE {
+    return is_capture_muted_;
+  }
+
+  void SetCaptureMuted(bool mute) OVERRIDE {
+    is_capture_muted_ = mute;
+  }
+
+  bool IsCaptureMuteLocked() OVERRIDE {
+    return is_capture_mute_locked_;
+  }
+
+  void SetCaptureMuteLocked(bool locked) OVERRIDE {
+    is_capture_mute_locked_ = locked;
   }
 
  private:
   double volume_;
   bool is_muted_;
+  bool is_mute_locked_;
+  bool is_capture_muted_;
+  bool is_capture_mute_locked_;
 
   DISALLOW_COPY_AND_ASSIGN(MockAudioMixer);
 };
 
 // This class has to be browsertest because AudioHandler uses prefs_service.
 class VolumeControllerTest : public InProcessBrowserTest {
  public:
   VolumeControllerTest() {}
 
   virtual void SetUpOnMainThread() OVERRIDE {
@@ skipping 91 matching lines @@
   EXPECT_DOUBLE_EQ(0.0, audio_mixer()->GetVolumePercent());
 
   // Thus, further VolumeUp doesn't recover the volume, it's just slightly
   // bigger than 0.
   VolumeUp();
   EXPECT_LT(0.0, audio_mixer()->GetVolumePercent());
   EXPECT_GT(initial_volume, audio_mixer()->GetVolumePercent());
 }
 
 }  // namespace