Remove unused pre-material NTP styling.

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

Index: chrome/android/java/res/layout/new_tab_page_layout.xml
diff --git a/chrome/android/java/res/layout/new_tab_page_layout.xml b/chrome/android/java/res/layout/new_tab_page_layout.xml
index e5bf10462c791293e565376450b37848103618bf..4dc623c6763fb41101554f75566bbc1fc0377f82 100644
--- a/chrome/android/java/res/layout/new_tab_page_layout.xml
+++ b/chrome/android/java/res/layout/new_tab_page_layout.xml
@@ -59,13 +59,17 @@
         android:id="@+id/search_box"
         android:layout_width="match_parent"
         android:layout_height="@dimen/ntp_search_box_height"
-        android:layout_marginStart="12dp"
-        android:layout_marginEnd="12dp"
-        android:layout_marginTop="7dp"
-        android:layout_marginBottom="8dp"
+        android:layout_marginStart="10dp"
+        android:layout_marginEnd="10dp"
+        android:layout_marginTop="0dp"
+        android:layout_marginBottom="1dp"
         android:gravity="center_vertical"
-        android:background="@drawable/bg_ntp_search_box"
-        android:orientation="horizontal" >
+        android:background="@drawable/textbox"
+        android:orientation="horizontal"
+        android:paddingStart="2dp"
+        android:paddingEnd="2dp"
+        android:paddingTop="3dp"
+        android:paddingBottom="3dp" >
         <EditText
             android:id="@+id/search_box_text"
             android:layout_width="0dp"