Added a UI for the Interests Prototype.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
index 9abd51615a5edf384459fa45f4f5870d36316634..15221e5ca2ee3f4dacba7cef01414e99e00c5f1c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
@@ -45,6 +45,8 @@ import org.chromium.chrome.browser.ntp.BookmarksPage.BookmarkSelectedListener;
 import org.chromium.chrome.browser.ntp.LogoBridge.Logo;
 import org.chromium.chrome.browser.ntp.LogoBridge.LogoObserver;
 import org.chromium.chrome.browser.ntp.NewTabPageView.NewTabPageManager;
+import org.chromium.chrome.browser.ntp.interests.InterestsPage;
+import org.chromium.chrome.browser.ntp.interests.InterestsPage.InterestsClickListener;
 import org.chromium.chrome.browser.offlinepages.OfflinePageBridge;
 import org.chromium.chrome.browser.preferences.DocumentModeManager;
 import org.chromium.chrome.browser.preferences.DocumentModePreference;
@@ -69,6 +71,7 @@ import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.UrlUtilities;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.net.NetworkChangeNotifier;
+import org.chromium.sync.signin.ChromeSigninController;
 import org.chromium.ui.base.DeviceFormFactor;
 import org.chromium.ui.base.PageTransition;
 
@@ -190,6 +193,24 @@ public class NewTabPage
         }
     }
 
+    public static void launchInterestsDialog(Activity activity, final Tab tab) {
+        InterestsPage page =
+                new InterestsPage(activity, tab, Profile.getLastUsedProfile());
+        final Dialog dialog = new NativePageDialog(activity, page);
+
+        InterestsClickListener listener = new InterestsClickListener() {
+            @Override
+            public void onInterestClicked(String name) {
+                tab.loadUrl(new LoadUrlParams(
+                        TemplateUrlService.getInstance().getUrlForSearchQuery(name)));
+                dialog.dismiss();
+            }
+        };
+
+        page.setListener(listener);
+        dialog.show();
+    }
+
     public static void launchRecentTabsDialog(Activity activity, Tab tab) {
         DocumentRecentTabsManager manager = new DocumentRecentTabsManager(tab, activity);
         NativePage page = new RecentTabsPage(activity, manager);
@@ -218,6 +239,12 @@ public class NewTabPage
             return mFakeboxDelegate != null && mFakeboxDelegate.isVoiceSearchEnabled();
         }
 
+        @Override
+        public boolean isInterestsEnabled() {
+            return CommandLine.getInstance().hasSwitch(ChromeSwitches.ENABLE_INTERESTS)
+                    && ChromeSigninController.get(mActivity).isSignedIn();
+        }
+
         private void recordOpenedMostVisitedItem(MostVisitedItem item) {
             if (mIsDestroyed) return;
             NewTabPageUma.recordAction(NewTabPageUma.ACTION_OPENED_MOST_VISITED_ENTRY);
@@ -380,6 +407,14 @@ public class NewTabPage
         }
 
         @Override
+        public void navigateToInterests() {
+            if (mIsDestroyed) return;
+            RecordUserAction.record("MobileNTP.Interests.OpenDialog");
+            // TODO(peconn): Make this load a native page on tablets.
+            launchInterestsDialog(mActivity, mTab);
+        }
+
+        @Override
         public void focusSearchBox(boolean beginVoiceSearch, String pastedText) {
             if (mIsDestroyed) return;
             if (mFakeboxDelegate != null) {