Update menu look and feel on Android

chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java

Index: chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java b/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java
index 4cfefcf0d77a9275482fcbe68c7299777ee2ef09..a227ef07873ad69287375c247956d6ec7c9d0600 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java
@@ -65,7 +65,7 @@ public class AppMenu implements OnItemClickListener, OnKeyListener {
         mHandler = handler;
 
         mItemDividerHeight = itemDividerHeight;
-        assert mItemDividerHeight > 0;
+        assert mItemDividerHeight >= 0;
 
         mAdditionalVerticalOffset = res.getDimensionPixelSize(R.dimen.menu_vertical_offset);
         mVerticalFadeDistance = res.getDimensionPixelSize(R.dimen.menu_vertical_fade_distance);
@@ -99,6 +99,10 @@ public class AppMenu implements OnItemClickListener, OnKeyListener {
         });
         mPopup.setWidth(context.getResources().getDimensionPixelSize(R.dimen.menu_width));
 
+        // Need to explicitly set the background here.  Relying on it being set in the style caused
+        // an incorrectly drawn background.
+        mPopup.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.menu_bg));
+
         mCurrentScreenRotation = screenRotation;
         mIsByHardwareButton = isByHardwareButton;