Add new NTP layout with snippet cards and hide it behind a flag

chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java
index 64df7d0bf5ecc2e80aad60215441f03e8382f19b..c692025051b9c145db8e9f4d60af2ac9bf76f970 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java
@@ -20,8 +20,8 @@ public class SnippetsBridge {
      */
     public interface SnippetsObserver {
         @CalledByNative("SnippetsObserver")
-        public void onSnippetsAvailable(
-                String[] titles, String[] urls, String[] thumbnailUrls, String[] previewText);
+        public void onSnippetsAvailable(String[] titles, String[] urls, String[] thumbnailUrls,
+                String[] previewText, long[] timestamps);
     }
 
     /**
@@ -33,11 +33,12 @@ public class SnippetsBridge {
         mNativeSnippetsBridge = nativeInit(profile);
         SnippetsObserver wrappedObserver = new SnippetsObserver() {
             @Override
-            public void onSnippetsAvailable(
-                    String[] titles, String[] urls, String[] thumbnailUrls, String[] previewText) {
+            public void onSnippetsAvailable(String[] titles, String[] urls, String[] thumbnailUrls,
+                    String[] previewText, long[] timestamps) {
                 // Don't notify observer if we've already been destroyed.
                 if (mNativeSnippetsBridge != 0) {
-                    observer.onSnippetsAvailable(titles, urls, thumbnailUrls, previewText);
+                    observer.onSnippetsAvailable(
+                            titles, urls, thumbnailUrls, previewText, timestamps);
                 }
             }
         };