Show policy allowed URLs as policy exceptions in the media settings.

chrome/test/data/policy/policy_test_cases.json

 {
   "-- Template --": {
     "intro": "Top-level entries map a policy name to its test parameters, described below. The name of the top level entry should be of the form <policy name>[.suffix]. The optional suffix is used for defining multiple test cases for a single policy.",
 
     "os": ["List of operating systems that support this policy. Valid values:", "win", "linux", "mac", "chromeos", "Defaults to empty if not specified."],
     "official_only": "Whether this policy exists in official builds only. Defaults to |false| if not specified.",
     "can_be_recommended": "Whether a recommended value may be set for the policy. Defaults to |false| if not specified.",
     "test_policy": "A policy dictionary that should make the preferences affected by this policy become policy-controlled. Usually just sets the current policy. Defaults to an empty dictionary if not specified.",
     "note": "If the policy affects any preferences, the following array should be specified with one entry per such preference.",
     "pref_mappings": [
@@ skipping 1130 matching lines @@
         ]
       }
     ]
   },
 
   "AudioCaptureAllowedUrls": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "AudioCaptureAllowedUrls": ["[*.]google.com"] },
     "pref_mappings": [
       {
-        "pref": "hardware.audio_capture_allowed_urls"
+        "pref": "hardware.audio_capture_allowed_urls",
+        "indicator_selector": "[content-exception=media-stream-mic]",
+        "indicator_tests": [
+          { "policy": { "AudioCaptureAllowedUrls": ["[*.]google.com"] } }
+        ]
       }
     ]
   },
 
   "VideoCaptureAllowed": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "VideoCaptureAllowed": false },
     "pref_mappings": [
       { "pref": "hardware.video_capture_enabled",
         "indicator_selector": "[content-setting=media-stream-camera][value=block]",
         "indicator_tests": [
           { "policy": { "VideoCaptureAllowed": false },
             "value": "block"
           }
         ]
       }
     ]
   },
 
   "VideoCaptureAllowedUrls": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "VideoCaptureAllowedUrls": ["[*.]google.com"] },
     "pref_mappings": [
       {
-        "pref": "hardware.video_capture_allowed_urls"
+        "pref": "hardware.video_capture_allowed_urls",
+        "indicator_selector": "[content-exception=media-stream-camera]",
+        "indicator_tests": [
+          { "policy": { "VideoCaptureAllowedUrls": ["[*.]google.com"] } }
+        ]
       }
     ]
   },
 
   "AutoSelectCertificateForUrls": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "AutoSelectCertificateForUrls": ["{'pattern':'https://example.com','filter':{'ISSUER':{'CN': 'issuer-name'}}}"] },
     "pref_mappings": [
       { "pref": "profile.managed_auto_select_certificate_for_urls" }
     ],
@@ skipping 1358 matching lines @@
 
   "AdditionalLaunchParameters": {
   },
 
   "SuppressChromeFrameTurndownPrompt": {
   },
 
   "SkipMetadataCheck": {
   }
 }