[Android History] List item shadows and width constrained styling

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

 <?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. -->
 

[Theresa, 2017/01/27 00:57:35]

From UX review, "The text block is supposed to be 72dp from the left and the
icons 20dp from the left. Looks like current the icons are 24dp from left and
text is 64dp from left"

All other padding/spacing (that's in our control) looks correct now.

[Theresa, 2017/01/27 23:34:45]

Done.

 <org.chromium.chrome.browser.history.HistoryItemView
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content" >
 
     <LinearLayout
         android:id="@+id/content"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="16dp"
         android:paddingBottom="16dp"
         android:orientation="horizontal"
-        android:background="@android:color/white" >
+        android:paddingEnd="16dp" >

[Theresa, 2017/01/27 23:34:45]

This moved back to the trash can to make its touch target go to the edge of the
screen. When the trash can is GONE (supervised users), padding is
programatically added to this LinearLayout.

 
         <ImageView
             android:id="@+id/icon_view"
             style="@style/HistoryStartIcon"
             android:contentDescription="@null"
             android:src="@drawable/default_favicon" />
 
         <LinearLayout
           android:layout_width="0dp"
           android:layout_height="wrap_content"
@@ skipping 21 matching lines @@
 
         <org.chromium.chrome.browser.widget.TintedImageButton
             android:id="@+id/remove"
             style="@style/HistoryEndIcon"
             android:contentDescription="@string/remove"
             android:src="@drawable/btn_trash"
             chrome:tint="@color/dark_mode_tint" />
     </LinearLayout>
 
 </org.chromium.chrome.browser.history.HistoryItemView>