Add a policy list for access to capture devices

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 92d8296ed239e61250c8e66c626de55bf9c73d62..c950a78b4e87d4fb09b732dc619631365bc335a9 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2025,15 +2025,23 @@ const char kDailyHttpReceivedContentLength[] =
 // date of the last update to |kDailyHttp{Original,Received}ContentLength|.
 const char kDailyHttpContentLengthLastUpdateDate[] =
     "data_reduction.last_update_date";
-#endif
+#endif  // defined(OS_ANDROID) || defined(OS_IOS)
 
-// A pref holding the value of the policy used to disable capturing audio on
-// ChromeOS devices.
+// A pref holding the value of the policy used to explicitly allow or deny
+// access to audio capture devices.  When enabled, this works in conjunction
+// with the kAudioCaptureAllowedUrls policy list.
 const char kAudioCaptureAllowed[] = "hardware.audio_capture_enabled";
+// Holds the whitelisted URL patterns that we refer to when kAudioCaptureAllowed
+// is enabled.
+const char kAudioCaptureAllowedUrls[] = "hardware.audio_capture_allowed_urls";
 
-// A pref holding the value of the policy used to disable capturing audio on
-// ChromeOS devices.
+// A pref holding the value of the policy used to explicitly allow or deny
+// access to video capture devices.  When enabled, this works in conjunction
+// with the kVideoCaptureAllowedUrls policy list.
 const char kVideoCaptureAllowed[] = "hardware.video_capture_enabled";
+// Holds the whitelisted URL patterns that we refer to when kVideoCaptureAllowed
+// is enabled.
+const char kVideoCaptureAllowedUrls[] = "hardware.video_capture_allowed_urls";
 
 #if defined(OS_CHROMEOS)
 // Dictionary for transient storage of settings that should go into device