webapps: add splashscreen for installed webapps

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

Index: chrome/android/java/res/layout/webapp_splash_screen.xml
diff --git a/chrome/android/java/res/layout/webapp_splash_screen.xml b/chrome/android/java/res/layout/webapp_splash_screen.xml
new file mode 100644
index 0000000000000000000000000000000000000000..51881d655b892aac9ce234f3ee71bea06deabb04
--- /dev/null
+++ b/chrome/android/java/res/layout/webapp_splash_screen.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+   Copyright 2015 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.
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+    <ImageView
+        android:id="@+id/webapp_splash_screen_icon"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:contentDescription="@null" />
+
+    <TextView
+        android:id="@+id/webapp_splash_screen_name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|center_horizontal"
+        android:layout_marginBottom="64dp"
+        android:fontFamily="sans-serif-condensed"
+        android:textColor="@color/default_text_color"
+        android:textSize="24sp" />
+</FrameLayout>