Implement GetDisplayed on android M+

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

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
index 6635ecca72c969545d3f25e12d52abd9980284de..94ee79608e7d19e1fc88eccca368e74f01ce3e3a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
@@ -18,6 +18,7 @@ import android.graphics.PorterDuff;
 import android.graphics.PorterDuffColorFilter;
 import android.graphics.drawable.Icon;
 import android.os.Build;
+import android.os.Bundle;
 
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.browser.widget.RoundedIconGenerator;
@@ -121,6 +122,7 @@ public abstract class NotificationBuilderBase {
     protected long[] mVibratePattern;
     protected long mTimestamp;
     protected boolean mRenotify;
+    protected Bundle mExtras;
 
     private Bitmap mLargeIcon;
 
@@ -309,6 +311,18 @@ public abstract class NotificationBuilderBase {
     }
 
     /**
+     * Sets the extras bundle on supported platforms.
+     */
+    @TargetApi(Build.VERSION_CODES.M)
+    public NotificationBuilderBase setExtras(Bundle extras) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+            return this;
+        }
+        mExtras = extras;
+        return this;
+    }
+
+    /**
      * Gets the large icon for the notification.
      *
      * If a large icon was supplied to the builder, returns this icon, scaled to an appropriate size