Added a UI for the Interests Prototype.

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index 7790bf3ac2558c8640b73f414b32b60521b9dca0..d16f37e52276fa5f32055a4592c67443f3537ccf 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -1686,6 +1686,12 @@ You are signing in with a managed account and giving its administrator control o
       <message name="IDS_NTP_BOOKMARKS" desc="Text for bookmarks button [CHAR-LIMIT=20]">
         Bookmarks
       </message>
+      <message name="IDS_NTP_INTERESTS" desc="Text for interests button [CHAR-LIMIT=20]">

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

Translators probably need more context here. What is the "interests button"? You
should also contact the l10n team to make sure they've added "Interests" to
their translation glossary.

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

Done.

+        Interests
+      </message>
+      <message name="IDS_NTP_NO_INTERESTS_TOAST" desc="Toast notification displayed when interests retrieval fails [CHAR-LIMIT=40]">

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

Don't need CHAR-LIMIT. CHAR-LIMITs should only be used if a long translation
will be truncated or break the UI. See the top of this file for more details on
CHAR-LIMITS.

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

Done.

+        Could not retrieve interests.
+      </message>
       <message name="IDS_RECENT_TABS" desc="Text for button to show 'Recent tabs', i.e. recently closed tabs and tabs that are open on other devices [CHAR-LIMIT=20]">
         Recent tabs
       </message>
@@ -2162,6 +2168,9 @@ Just open Chrome on your computer, go to the menu, and select “Sign in to Chro
       <message name="IDS_ACCESSIBILITY_NTP_TOOLBAR_BTN_BOOKMARKS" desc="Content description for the bookmarks tab of the new tab page.">
         Bookmarks
       </message>
+      <message name="IDS_ACCESSIBILITY_NTP_TOOLBAR_BTN_INTERESTS" desc="Content description for the interests section of the new tab page.">
+        Interests
+      </message>
       <message name="IDS_ACCESSIBILITY_NTP_TOOLBAR_BTN_RECENT_TABS" desc="Content description for the recent tabs section of the new tab page.">
         Recent tabs
       </message>