Add a HostContentSettingsMap layer for Supervised Users.

chrome/browser/supervised_user/supervised_user_constants.cc

Index: chrome/browser/supervised_user/supervised_user_constants.cc
diff --git a/chrome/browser/supervised_user/supervised_user_constants.cc b/chrome/browser/supervised_user/supervised_user_constants.cc
index a51b61c7a16efeec88cec2527a0172611fec4d0c..889577c9d6f3015fe526384f58953e68e58bf246 100644
--- a/chrome/browser/supervised_user/supervised_user_constants.cc
+++ b/chrome/browser/supervised_user/supervised_user_constants.cc
@@ -6,13 +6,13 @@
 
 namespace supervised_users {
 
-const char kCameraMicAllowed[] = "CameraMicAllowed";
+const char kCameraMicDisabled[] = "CameraMicDisabled";
 const char kContentPackDefaultFilteringBehavior[] =
     "ContentPackDefaultFilteringBehavior";
 const char kContentPackManualBehaviorHosts[] = "ContentPackManualBehaviorHosts";
 const char kContentPackManualBehaviorURLs[] = "ContentPackManualBehaviorURLs";
 const char kForceSafeSearch[] = "ForceSafeSearch";
-const char kGeolocationAllowed[] = "GeolocationAllowed";
+const char kGeolocationDisabled[] = "GeolocationDisabled";

[Bernhard Bauer, 2015/02/26 12:44:58]

Is the only reason we are changing these constants so that the content settings
provider is easier to implement? I would rather have a consistent style for the
settings (which is that boolean flags are positive, i.e. "allowed" and
"enabled", rather than negative), even if that means slightly more work to
implement. Policy settings historically used a mixture of positive and negative
settings, and it's super confusing.

[knn, 2015/02/26 16:18:56]

To the contrary, Implementation is actually easier with 'Enabled'.
However, I think Disabled reflects the intent of the preference better.
Also this conveys in a subtle way (I think) that you can only Force disable the
setting and not the other way (force enable).

What do you think about the trade offs? I am happy to change it if you think it
is not worth the in-consistency it introduces.

[Bernhard Bauer, 2015/02/26 18:03:54]

That's a good point; I'll have to think about it.

(Sending the rest of the comments to unblock you.)

 const char kRecordHistory[] = "RecordHistory";
 const char kSigninAllowed[] = "SigninAllowed";
 const char kUserName[] = "UserName";