Disable Web Notifications in Incognito

components/content_settings/core/browser/content_settings_info.h

Index: components/content_settings/core/browser/content_settings_info.h
diff --git a/components/content_settings/core/browser/content_settings_info.h b/components/content_settings/core/browser/content_settings_info.h
index b7018dfff5209db38fb0b1c92d812f998764edfe..c18452f338861317f0852d522073fd4ac7102ec8 100644
--- a/components/content_settings/core/browser/content_settings_info.h
+++ b/components/content_settings/core/browser/content_settings_info.h
@@ -26,7 +26,15 @@ class ContentSettingsInfo {
     // Content setting will only partially inherit from regular to incognito
     // profiles: BLOCK will inherit as usual, but ALLOW will become ASK.
     // This is unusual, so seek privacy review before using this.
-    INHERIT_IN_INCOGNITO_EXCEPT_ALLOW
+    INHERIT_IN_INCOGNITO_EXCEPT_ALLOW,
+
+    // Content setting is always denied in incognito. However, to prevent sites
+    // from using this setting to detect whether incognito mode is active, this
+    // acts like INHERIT_IN_INCOGNITO_EXCEPT_ALLOW initially, and only denies
+    // the permission once it is requested, after a random time delay that
+    // simulates a user clicking a bubble/infobar.
+    // This is unusual, so seek privacy review before using this.

[raymes, 2016/01/11 00:41:11]

nit: fill previous line (or new paragraph)

[johnme, 2016/01/11 13:53:52]

Done.

+    DENY_IN_INCOGNITO_AFTER_DELAY
   };
 
   // This object does not take ownership of |website_settings_info|.