[NTP Snippets] Show a status card when there are no available snippets

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetHeaderListItem.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetHeaderListItem.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetHeaderListItem.java
index 79f398fd5731824d03765da7e8cfa5bea4b3a5c1..242199c360891a3d581e4cb19431f4061aabafae 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetHeaderListItem.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetHeaderListItem.java
@@ -15,6 +15,8 @@
  * Represents the data for a header of a group of snippets
  */
 public class SnippetHeaderListItem implements NewTabPageListItem {
+    /** Whether the header should be shown. */
+    private boolean mVisible = false;
 
     /**
      * Creates the View object for displaying the header for a group of snippets
@@ -31,4 +33,12 @@ public static View createView(ViewGroup parent) {
     public int getType() {
         return NewTabPageListItem.VIEW_TYPE_HEADER;
     }
+
+    public boolean isVisible() {
+        return mVisible;
+    }
+
+    public void setVisible(boolean visible) {
+        mVisible = visible;
+    }
 }