Bug 1229958 - Remove android:panelBackground. r=sebastian

There is no noticeable difference in background color of the menu on my 4.* GS4
or my 2.3 Nexus S, though perhaps it affects more than the menu.

The menu_panel_bg drawable is now unused so I removed that too.

--HG--
extra : commitid : KCVkyjjjDjL
extra : rebase_source : 42502a88bc5debbb4635aaaadb6d6dfba43a8ef1

mobile/android/base/resources/values-v11/themes.xml

@@ -41,7 +41,6 @@
         <item name="android:actionModeCutDrawable">@drawable/ab_cut</item>
         <item name="android:actionModePasteDrawable">@drawable/ab_paste</item>
         <item name="android:listViewStyle">@style/Widget.ListView</item>
-        <item name="android:panelBackground">@drawable/menu_panel_bg</item>
         <item name="android:spinnerDropDownItemStyle">@style/Widget.DropDownItem.Spinner</item>
         <item name="android:spinnerItemStyle">@style/Widget.TextView.SpinnerItem</item>
         <item name="menuItemSwitcherLayoutStyle">@style/Widget.MenuItemSwitcherLayout</item>

mobile/android/base/resources/values-v14/themes.xml

@@ -17,7 +17,6 @@
         <item name="android:actionModeSelectAllDrawable">@drawable/ab_select_all</item>
         <item name="android:actionModeStyle">@style/GeckoActionBar</item>
         <item name="android:listViewStyle">@style/Widget.ListView</item>
-        <item name="android:panelBackground">@drawable/menu_panel_bg</item>
         <item name="android:spinnerDropDownItemStyle">@style/Widget.DropDownItem.Spinner</item>
         <item name="android:spinnerItemStyle">@style/Widget.TextView.SpinnerItem</item>
         <item name="menuItemSwitcherLayoutStyle">@style/Widget.MenuItemSwitcherLayout</item>

mobile/android/base/resources/values-v21/themes.xml

@@ -37,7 +37,6 @@
     <style name="GeckoAppBase" parent="Gecko">
         <item name="android:actionButtonStyle">@style/GeckoActionBar.Button</item>
         <item name="android:listViewStyle">@style/Widget.ListView</item>
-        <item name="android:panelBackground">@drawable/menu_panel_bg</item>
         <item name="android:spinnerDropDownItemStyle">@style/Widget.DropDownItem.Spinner</item>
         <item name="android:spinnerItemStyle">@style/Widget.TextView.SpinnerItem</item>
         <item name="menuItemSwitcherLayoutStyle">@style/Widget.MenuItemSwitcherLayout</item>

mobile/android/base/resources/values/themes.xml

@@ -12,13 +12,6 @@
     <style name="GeckoBase" parent="Theme.AppCompat.Light.DarkActionBar">
         <item name="windowNoTitle">true</item>
         <item name="android:windowContentOverlay">@null</item>
-
-        <!-- Gingerbread "More" menu background color; AppCompat sets this to
-             transparent by default: http://stackoverflow.com/a/31777488.
-             This color is set anecdotally to make all text colors, which change
-             by device, visible. Standard colors are #8D8D8D & #C8C8C8 (disabled)
-             and #000000 has also been seen. -->
-        <item name="android:panelBackground">@color/text_and_tabs_tray_grey</item>
     </style>
 
     <style name="GeckoDialogBase" parent="@android:style/Theme.Dialog">