Refreshing the tab switcher assets.

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

 <?xml version="1.0" encoding="utf-8"?>
 
 <!-- Copyright 2014 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.
 -->
 
 <org.chromium.chrome.browser.widget.accessibility.AccessibilityTabModelWrapper
     xmlns:android="http://schemas.android.com/apk/res/android"
@@ skipping 18 matching lines @@
         android:orientation="horizontal"
         android:id="@+id/button_wrapper"
         android:visibility="gone">
 
         <ImageButton
             android:id="@+id/standard_tabs_button"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:background="@drawable/ntp_toolbar_button_background_selected"
-            android:src="@drawable/tabstrip_incognito_switch_normal"
+            android:src="@drawable/btn_tabstrip_incognito_switch"
             android:contentDescription="@string/accessibility_tab_switcher_standard_stack"
             style="?android:attr/borderlessButtonStyle" />
 
         <View
             android:layout_width="1px"
             android:layout_height="18dp"
             android:layout_gravity="center_vertical"
             android:background="#292929" />
 
         <ImageButton
             android:id="@+id/incognito_tabs_button"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:src="@drawable/tabstrip_incognito_switch_incognito"
+            android:src="@drawable/btn_tabstrip_incognito_switch_incognito"
             android:background="@drawable/ntp_toolbar_button_background"
             android:contentDescription="@string/accessibility_tab_switcher_incognito_stack"
             style="?android:attr/borderlessButtonStyle" />
     </LinearLayout>
 </org.chromium.chrome.browser.widget.accessibility.AccessibilityTabModelWrapper>