[Android] Implement GetRuleIterator for channels provider

chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationSettingsBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationSettingsBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationSettingsBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationSettingsBridge.java
index 5546b6ee984e335e6408034f537d052cb0bbc3a9..d4c23971e49cb58b7118605b898bb5e768dfc491 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationSettingsBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationSettingsBridge.java
@@ -37,8 +37,34 @@ public class NotificationSettingsBridge {
         return NotificationChannelStatus.UNAVAILABLE;
     }
 
+    @CalledByNative
+    static SiteChannel[] getSiteChannels() {
+        // TODO(crbug.com/700377) Actually get site channels.
+        return new SiteChannel[] {};
+    }
+
     @CalledByNative
     static void deleteChannel(String origin) {
         // TODO(crbug.com/700377) Actually delete channel.
     }
+
+    static class SiteChannel {
+        private final String mOrigin;
+        private final @NotificationChannelStatus int mStatus;
+
+        private SiteChannel(String origin, @NotificationChannelStatus int status) {
+            mOrigin = origin;
+            mStatus = status;
+        }
+
+        @CalledByNative("SiteChannel")
+        private String getOrigin() {
+            return mOrigin;
+        }
+
+        @CalledByNative("SiteChannel")
+        private @NotificationChannelStatus int getStatus() {
+            return mStatus;
+        }
+    }
 }