[Android] Updating menu assets.

chrome/android/java/res/drawable/btn_back.xml

Index: chrome/android/java/res/drawable/btn_back.xml
diff --git a/chrome/android/java/res/drawable-ldrtl/forward_button_selector.xml b/chrome/android/java/res/drawable/btn_back.xml
similarity index 53%
rename from chrome/android/java/res/drawable-ldrtl/forward_button_selector.xml
rename to chrome/android/java/res/drawable/btn_back.xml
index a2146ca425476b7a023830e58f619a9c87ddf2a7..8f10ff69d604dd3930095ba08e09c6b1f943aac0 100644
--- a/chrome/android/java/res/drawable-ldrtl/forward_button_selector.xml
+++ b/chrome/android/java/res/drawable/btn_back.xml
@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<!-- Copyright 2013 The Chromium Authors. All rights reserved.
+<!-- 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.
 -->
 
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:state_enabled="false" android:drawable="@drawable/back_disabled" />
-    <item android:drawable="@drawable/back" />
+    <item android:state_enabled="false" android:drawable="@drawable/btn_back_disabled" />
+    <item android:state_pressed="true" android:drawable="@drawable/btn_back_pressed" />
+    <item android:drawable="@drawable/btn_back_normal" />
 </selector>