Added a UI for the Interests Prototype.

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java
index 95dad06bb3e3c022f6bbf6323484847644025b2d..0b8205dfc65351ca3ead78dbc5be00dd8d4909f7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java
@@ -22,7 +22,7 @@ import org.chromium.chrome.browser.widget.TintedDrawable;
  */
 public class NewTabPageToolbar extends LinearLayout {
 
-    private ViewGroup mBookmarksButton, mRecentTabsButton;
+    private ViewGroup mBookmarksButton, mRecentTabsButton, mInterestsButton;
 
     /**
      * Constructor for inflating from xml.
@@ -39,12 +39,17 @@ public class NewTabPageToolbar extends LinearLayout {
         return mRecentTabsButton;
     }
 
+    public View getInterestsButton() {
+        return mInterestsButton;
+    }
+
     @Override
     protected void onFinishInflate() {
         mBookmarksButton = initButton(R.id.bookmarks_button, R.drawable.btn_star);
         mRecentTabsButton = initButton(R.id.recent_tabs_button, R.drawable.btn_recents);
         ((TextView) mBookmarksButton.getChildAt(0)).setText(OfflinePageBridge.isEnabled()
                 ? R.string.offline_pages_ntp_button_name : R.string.ntp_bookmarks);
+        mInterestsButton =  initButton(R.id.interests_button, R.drawable.btn_star_filled);
     }
 
     private ViewGroup initButton(int buttonId, int drawableId) {