[Android] Adding content settings provider for notification channels

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index 5e8d2bd096ab997822ecbfa9b662def50992f9e4..0f99ecf26e45a657a32f7ffe1dca2ef26c224522 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -311,6 +311,11 @@ const base::Feature kRunAllFlashInAllowMode{"RunAllFlashInAllowMode",
 const base::Feature kSafeSearchUrlReporting{"SafeSearchUrlReporting",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enables separate notification channels in Android O for notifications from
+// different origins, instead of sending them all to a single 'Sites' channel.
+const base::Feature kSiteNotificationChannels{
+    "SiteNotificationChannels", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // A new user experience for transitioning into fullscreen and mouse pointer
 // lock states.
 const base::Feature kSimplifiedFullscreenUI{"ViewsSimplifiedFullscreenUI",