[Android] Implement empty view for download manager ui

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

Index: chrome/android/java/res/layout/download_main.xml
diff --git a/chrome/android/java/res/layout/download_main.xml b/chrome/android/java/res/layout/download_main.xml
index d6f860723ce8876690c91aa8fe732492bc8c8995..da5b9c264d53ed9d6378d727ac59c384062a36d2 100644
--- a/chrome/android/java/res/layout/download_main.xml
+++ b/chrome/android/java/res/layout/download_main.xml
@@ -9,36 +9,7 @@
     android:layout_height="match_parent" >
 
     <!-- MAIN CONTENT -->
-    <LinearLayout
-        android:id="@+id/content_frame"
-        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" >
-
-            <include layout="@layout/number_roll_view" />
-
-        </org.chromium.chrome.browser.download.ui.DownloadManagerToolbar>
-
-        <org.chromium.chrome.browser.widget.FadingShadowView
-            android:id="@+id/shadow"
-            android:layout_width="match_parent"
-            android:layout_height="10dp"
-            android:layout_marginBottom="-10dp" />
-    
-        <android.support.v7.widget.RecyclerView
-            android:id="@+id/recycler_view"
-            android:layout_width="match_parent"
-            android:layout_height="0dp"
-            android:layout_weight="1" />
-
-    </LinearLayout>
+    <include layout="@layout/download_content" />
 
     <!-- NAVIGATION DRAWER
          We can't assign a paddingStart or paddingEnd because the section highlights are full-bleed.