Extract a DataSource interface for items shown in a status card.

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/StatusCardViewHolder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/StatusCardViewHolder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/StatusCardViewHolder.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/StatusCardViewHolder.java
index 7b745d78993c48371fce45bf0ca3864054ce2c08..cf561cc26dad44d2e3c6a629590c6310c5264c6a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/StatusCardViewHolder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/StatusCardViewHolder.java
@@ -4,6 +4,9 @@
 
 package org.chromium.chrome.browser.ntp.cards;
 
+import android.content.Context;
+import android.support.annotation.IntegerRes;
+import android.support.annotation.StringRes;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
@@ -26,14 +29,46 @@ public class StatusCardViewHolder extends CardViewHolder {
         mActionView = (Button) itemView.findViewById(R.id.status_action_button);
     }
 
-    public void onBindViewHolder(final StatusItem item) {
+    /**
+     * Interface for data items that will be shown in this card.
+     */
+    public interface DataSource {
+        /**
+         * @return Resource ID for the header string.
+         */
+        @StringRes
+        int getHeader();
+
+        /**
+         * @return Resource ID for the description string.
+         */
+        @StringRes
+        int getDescription();
+
+        /**
+         * @return Resource ID for the action label string, or 0 if the card does not have a label.
+         */
+        @StringRes
+        int getActionLabel();
+
+        /**
+         * Called when the user clicks on the action button.
+         *
+         * @param context The context to execute the action in.
+         */
+        void performAction(Context context);
+    }
+
+    public void onBindViewHolder(final DataSource item) {
         super.onBindViewHolder();
 
         mTitleView.setText(item.getHeader());
         mBodyView.setText(item.getDescription());
 
-        if (item.hasAction()) {
-            mActionView.setText(item.getActionLabel());
+        @IntegerRes
+        int actionLabel = item.getActionLabel();
+        if (actionLabel != 0) {
+            mActionView.setText(actionLabel);
             mActionView.setOnClickListener(new View.OnClickListener() {
 
                 @Override