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

chrome/app/policy/policy_templates.json

Index: chrome/app/policy/policy_templates.json
diff --git a/chrome/app/policy/policy_templates.json b/chrome/app/policy/policy_templates.json
index 5a49baa5124f10a8742f68634c071db0694c3e45..8dc4fde74c8820328ecd7b53e6b90116f451cb1e 100644
--- a/chrome/app/policy/policy_templates.json
+++ b/chrome/app/policy/policy_templates.json
@@ -112,7 +112,7 @@
 #   persistent IDs for all fields (but not for groups!) are needed. These are
 #   specified by the 'id' keys of each policy. NEVER CHANGE EXISTING IDs,
 #   because doing so would break the deployed wire format!
-#   For your editing convenience: highest ID currently used: 158
+#   For your editing convenience: highest ID currently used: 160
 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
@@ -3149,6 +3149,40 @@
       If this setting is disabled or not configured then users can use all supported types of external storage on their device.''',
     },
     {
+      'name': 'AudioOutputAllowed',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome_os:0.23-'],
+      'features': {'dynamic_refresh': True},
+      'example_value': False,
+      'id': 159,
+      'caption': '''Allow playing audio''',
+      'desc': '''Allow playing audio.
+
+      When this policy is set to false, audio output will not be available on the device while the user is logged in.
+
+      This policy affects all types of audio output and not only the built-in speakers. Audio accessability features are also inhibited by this policy. Do not enable this policy if a screen reader is required for the user.
+
+      If this setting is set to true or not configured then users can use all supported audio outputs on their device.''',
+    },
+    {
+      'name': 'AudioCaptureAllowed',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome_os:0.23-'],
+      'features': {'dynamic_refresh': True},
+      'example_value': False,
+      'id': 160,
+      'caption': '''Allow capturing audio''',
+      'desc': '''Allow capturing audio.
+
+      When this policy is set to false, audio capturing will not be available on the device while the user is logged in.
+
+      This policy affects all types of audio inputs and not only the built-in microphone.
+
+      If this setting is set to true or not configured then users can use all supported audio inputs on their device.''',
+    },
+    {
       'name': 'DisableScreenshots',
       'type': 'main',
       'schema': { 'type': 'boolean' },