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 2122168a29a5658c8104903d9f28c47e428f828b..6fe73a2bfb8703c6b438df5b675613bd147c4f17 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
@@ -36,6 +36,7 @@ import org.chromium.chrome.browser.favicon.LargeIconBridge;
 import org.chromium.chrome.browser.favicon.LargeIconBridge.LargeIconCallback;
 import org.chromium.chrome.browser.metrics.StartupMetrics;
 import org.chromium.chrome.browser.ntp.BookmarksPage.BookmarkSelectedListener;
+import org.chromium.chrome.browser.ntp.InterestsPage.InterestsClickListener;
 import org.chromium.chrome.browser.ntp.LogoBridge.Logo;
 import org.chromium.chrome.browser.ntp.LogoBridge.LogoObserver;
 import org.chromium.chrome.browser.ntp.NewTabPageView.NewTabPageManager;
@@ -169,6 +170,26 @@ public class NewTabPage
         }
     }
 
+    public static void launchInterestsDialog(Activity activity, final Tab tab) {
+        InterestsPage page =
+                new InterestsPage(activity, tab, Profile.getLastUsedProfile(), activity);
+        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();

[newt (away), 2015/12/12 00:30:31]

style nit: there's a few too many newlines here IMO. Use newlines to separate
logical sections of code, but don't separate every single line.

[PEConn, 2015/12/14 17:05:16]

Done.

+            }
+        };
+
+        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);
@@ -315,6 +336,13 @@ public class NewTabPage
         }
 
         @Override
+        public void navigateToInterests() {
+            if (mIsDestroyed) return;
+            RecordUserAction.record("MobileNTP.Interests.OpenDialog");
+            launchInterestsDialog(mActivity, mTab);

[newt (away), 2015/12/12 00:30:31]

what happens on tablets? A fullscreen dialog?

[PEConn, 2015/12/14 17:05:15]

Yes, for the moment. As you suggested in InterestsPage.java, this will
eventually bring up a native page, but for now it is a full page dialog.

+        }
+
+        @Override
         public void focusSearchBox(boolean beginVoiceSearch, String pastedText) {
             if (mIsDestroyed) return;
             if (mFakeboxDelegate != null) {
@@ -659,4 +687,5 @@ public class NewTabPage
             mDialog = dialog;
         }
     }
+

[newt (away), 2015/12/12 00:30:31]

remove this

[PEConn, 2015/12/14 17:05:16]

Done.

 }