Add a HostContentSettingsMap layer for Supervised Users.

chrome/browser/supervised_user/supervised_user_constants.h

Index: chrome/browser/supervised_user/supervised_user_constants.h
diff --git a/chrome/browser/supervised_user/supervised_user_constants.h b/chrome/browser/supervised_user/supervised_user_constants.h
index f72430b068053d623e2bfa697ab274029eb94416..e4aa3a0fa247cab2e5bc5640d827749822bb6bf9 100644
--- a/chrome/browser/supervised_user/supervised_user_constants.h
+++ b/chrome/browser/supervised_user/supervised_user_constants.h
@@ -9,12 +9,12 @@ namespace supervised_users {
 
 // Keys for supervised user settings. These are configured remotely and mapped
 // to preferences by the SupervisedUserPrefStore.
-extern const char kCameraMicAllowed[];

[Bernhard Bauer, 2015/02/05 12:07:51]

So the old value was never used in the SupervisedUserPrefStore, i.e. this never
actually worked on trunk?

[knn, 2015/02/26 12:07:29]

I accidentally reverted the file before submitting the original change (after a
bad 'git cl format').
Did not realize that until I worked on this change. I'll make sure I check for
all files in the future.

+extern const char kCameraMicDisabled[];
 extern const char kContentPackDefaultFilteringBehavior[];
 extern const char kContentPackManualBehaviorHosts[];
 extern const char kContentPackManualBehaviorURLs[];
 extern const char kForceSafeSearch[];
-extern const char kGeolocationAllowed[];
+extern const char kGeolocationDisabled[];
 extern const char kRecordHistory[];
 extern const char kSigninAllowed[];
 extern const char kUserName[];