Gray horizontal keyboard accessory

chrome/android/java/res/layout/main.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. -->
 
 <merge xmlns:android="http://schemas.android.com/apk/res/android">
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical">
 
         <org.chromium.chrome.browser.compositor.CompositorViewHolder
             android:id="@+id/compositor_view_holder"
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1" />
 
-        <FrameLayout
+        <HorizontalScrollView
+            android:background="#FFF"
             android:id="@+id/keyboard_accessory"
+            android:layout_height="wrap_content"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
+            android:paddingEnd="@dimen/keyboard_accessory_half_padding"

[aurimas (slooooooooow), 2015/07/28 00:10:28]

Do we want to add the padding to the scroll view or the view that is going to be
inside the scroll view? The question is where we want to clip. I would suggest
to add padding to the content as that way it can scroll all the way to the edge
instead of getting clipped.

[please use gerrit instead, 2015/07/28 21:07:46]

Done.

+            android:paddingStart="@dimen/keyboard_accessory_half_padding"
             android:visibility="gone" />
     </LinearLayout>
 
     <ViewStub
         android:id="@+id/omnibox_results_container_stub"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginTop="@dimen/tab_strip_height"
         android:inflatedId="@+id/omnibox_results_container"
         android:layout="@layout/omnibox_results_container" />
@@ skipping 17 matching lines @@
         android:layout_height="match_parent"
         />
     <!-- This empty view is used as the anchor for custom menu -->
     <View
         android:id="@+id/menu_anchor_stub"
         android:layout_width="0px"
         android:layout_height="0px"
         android:layout_gravity="bottom|start"
         />
 </merge>