Remove items on long press in keyboard accessory.

ui/android/java/res/layout/autofill_keyboard_accessory_item.xml

 <?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. -->
 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_height="@dimen/keyboard_accessory_height"
     android:layout_width="wrap_content"
     android:background="@drawable/autofill_chip_inset"
+    android:longClickable="true"

[newt (away), 2015/08/10 20:39:36]

This isn't needed. setOnLongClickListener() automatically sets the view to be
long-clickable.

[please use gerrit instead, 2015/08/11 20:42:19]

Done.

     android:paddingEnd="@dimen/keyboard_accessory_padding"
     android:paddingStart="@dimen/keyboard_accessory_padding">
 
     <TextView
         android:id="@+id/autofill_keyboard_accessory_item_label"
         android:layout_height="match_parent"
         android:layout_width="wrap_content"
         android:drawablePadding="@dimen/keyboard_accessory_half_padding"
         android:ellipsize="none"
         android:fadingEdgeLength="@dimen/keyboard_accessory_fading_edge_length"
@@ skipping 15 matching lines @@
         android:fadingEdgeLength="@dimen/keyboard_accessory_fading_edge_length"
         android:gravity="center_vertical"
         android:paddingEnd="@dimen/keyboard_accessory_half_padding"
         android:requiresFadingEdge="horizontal"
         android:singleLine="true"
         android:textColor="#646464"
         android:textSize="@dimen/keyboard_accessory_text_size"
         android:visibility="gone" />
 
 </LinearLayout>