[Android] Implement empty view for download manager ui

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

Index: chrome/android/java/res/layout/download_content.xml
diff --git a/chrome/android/java/res/layout/download_content.xml b/chrome/android/java/res/layout/download_content.xml
new file mode 100644
index 0000000000000000000000000000000000000000..e1637b64ba4dd1812d1e04f81d2592a94f974127
--- /dev/null
+++ b/chrome/android/java/res/layout/download_content.xml
@@ -0,0 +1,48 @@
+<?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. -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#ffffff"
+    android:orientation="vertical" >
+
+    <org.chromium.chrome.browser.download.ui.DownloadManagerToolbar
+        android:id="@+id/action_bar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="@color/appbar_background"
+        android:layout_alignParentTop="true" >
+
+        <include layout="@layout/number_roll_view" />
+
+    </org.chromium.chrome.browser.download.ui.DownloadManagerToolbar>
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_alignParentBottom="true"
+        android:layout_below="@id/action_bar" />
+
+    <org.chromium.chrome.browser.widget.FadingShadowView
+        android:id="@+id/shadow"
+        android:layout_width="match_parent"
+        android:layout_height="10dp"
+        android:layout_below="@id/action_bar" />
+
+    <TextView
+        android:id="@+id/empty_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"

[gone, 2016/08/24 18:07:57]

This centers it relative to the RelativeLayout, doesn't it?  It should be
centered in the area below the toolbar.  Is this more of a stopgap?

[Ian Wen, 2016/08/24 18:32:42]

Let's postpone it till the UX complains? :P

+        android:gravity="center"
+        android:padding="16dp"
+        android:drawablePadding="3dp"
+        android:text="@string/download_manager_ui_empty"
+        android:textColor="#5B5B5B"
+        android:textSize="16sp"
+        android:visibility="gone" />
+</RelativeLayout>