Added a UI for the Interests Prototype.

chrome/android/java/res/layout/new_tab_page.xml

Index: chrome/android/java/res/layout/new_tab_page.xml
diff --git a/chrome/android/java/res/layout/new_tab_page.xml b/chrome/android/java/res/layout/new_tab_page.xml
index e59ca3ec5ef4d605f8a1cf3286a9e927df448466..afc9dce8fee83432f853cf50b2a2d96b10ac6a0d 100644
--- a/chrome/android/java/res/layout/new_tab_page.xml
+++ b/chrome/android/java/res/layout/new_tab_page.xml
@@ -190,6 +190,26 @@
                 android:textColor="#5a5a5a" />
         </FrameLayout>
         <FrameLayout
+            android:background="?attr/listChoiceBackgroundIndicator"
+            android:contentDescription="@string/accessibility_ntp_toolbar_btn_interests"
+            android:id="@+id/interests_button"

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

Put id first, then layout_width, the layout_height, then other layout_*
attributes, then all other attributes. (This is the order used throughout Chrome
code and the same order used by the Android Studio auto-formatter)

layout_* attributes are grouped together since they're all instructions for how
the view will be arranged within its parent.

Also, please update interests_page.xml.

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

Done.

+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:layout_width="0dp"
+            android:paddingBottom="12dp"
+            android:paddingTop="12dp"
+            android:visibility="gone" >
+            <TextView
+                android:drawablePadding="8dp"
+                android:gravity="center_vertical"
+                android:layout_gravity="center_horizontal"
+                android:layout_height="match_parent"
+                android:layout_width="wrap_content"
+                android:text="@string/ntp_interests"
+                android:textColor="#5a5a5a"
+                android:textSize="12sp" />
+        </FrameLayout>
+        <FrameLayout
             android:id="@+id/recent_tabs_button"
             android:layout_width="0dp"
             android:layout_height="match_parent"