Added a UI for the Interests Prototype.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.ntp;
 
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
@@ skipping 116 matching lines @@
 
         /** Opens the bookmarks page in the current tab. */
         void navigateToBookmarks();
 
         /** Opens the recent tabs page in the current tab. */
         void navigateToRecentTabs();
 
         /** Opens a given URL in the current tab. */
         void open(String url);
 
+        /** Opens the recent tabs page in the current tab. */
+        void navigateToInterests();
+
         /**
          * Animates the search box up into the omnibox and bring up the keyboard.
          * @param beginVoiceSearch Whether to begin a voice search.
          * @param pastedText Text to paste in the omnibox after it's been focused. May be null.
          */
         void focusSearchBox(boolean beginVoiceSearch, String pastedText);
 
         /**
          * Gets the list of most visited sites.
          * @param observer The observer to be notified with the list of sites.
@@ skipping 153 matching lines @@
             public void onClick(View v) {
                 mManager.navigateToRecentTabs();
             }
         });
         toolbar.getBookmarksButton().setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 mManager.navigateToBookmarks();
             }
         });
+        toolbar.getInterestsButton().setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mManager.navigateToInterests();
+            }
+        });
 
         initializeSearchBoxScrollHandling();
         addOnLayoutChangeListener(this);
         setSearchProviderHasLogo(searchProviderHasLogo);
 
         mPendingLoadTasks++;
         mManager.setMostVisitedURLsObserver(this,
                 mMostVisitedDesign.getNumberOfTiles(searchProviderHasLogo));
 
         if (mManager.shouldShowOptOutPromo()) showOptOutPromo();
@@ skipping 778 matching lines @@
                 }
             }
         }
 
         @Override
         public boolean preferLargeIcons() {
             return true;
         }
     }
 }