[Android] Allow setting recently visited search engines as default search engine

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

Index: chrome/android/java/res/layout/search_engine_recent_title.xml
diff --git a/chrome/android/java/res/layout/search_engine_recent_title.xml b/chrome/android/java/res/layout/search_engine_recent_title.xml
new file mode 100644
index 0000000000000000000000000000000000000000..ff036e71b125710a19186e2ddba73b546ff099a0
--- /dev/null
+++ b/chrome/android/java/res/layout/search_engine_recent_title.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2016 The Chromium Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style license that can be
+     found in the LICENSE file. -->
+     
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_vertical"
+    android:paddingBottom="16dp"
+    android:paddingTop="16dp"
+    android:paddingStart="12dp"
+    android:paddingEnd="6dp">
+
+    <TextView
+        android:text="@string/search_engine_recently_visited"

[Ian Wen, 2016/10/17 23:32:21]

1. You shouldn't use LinearLayout. Linearlayout should only be used when you
need to layout children in linear fashion.
2. In this case you should not use a wrapper layout at all. Instead I would set
paddings.

[ltian, 2016/10/18 01:01:55]

Done.

+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textColor="@color/light_active_color"
+        android:textStyle="bold"
+        android:textSize="15sp"
+        android:gravity="center_vertical"/>
+
+</LinearLayout>