Update spinner background to the new popup background 9-patch

Bug: 900755
Change-Id: I07ed1f9e3bc27ff617b0f7d0f22ec5ac9ba22608
Reviewed-on: https://chromium-review.googlesource.com/c/1337069Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608490}

chrome/android/java/res/values-v17/styles.xml

@@ -30,6 +30,7 @@
         <item name="colorControlNormal">@color/control_normal_color</item>
         <item name="colorControlActivated">@color/light_active_color</item>
         <item name="colorControlHighlight">@color/control_highlight_color</item>
+        <item name="spinnerStyle">@style/SpinnerStyle</item>
 
         <!-- Navigation Transitions, requires API level 21 -->
         <item name="android:windowAllowEnterTransitionOverlap" tools:targetApi="21">false</item>
@@ -71,6 +72,7 @@
         <item name="colorPrimary">@color/light_active_color</item>
         <item name="colorAccent">@color/light_active_color</item>
         <item name="colorControlHighlight">@color/control_highlight_color</item>
+        <item name="spinnerStyle">@style/SpinnerStyle</item>
         <item name="windowNoTitle">true</item>
     </style>
     <style name="FullscreenWhite" parent="FullscreenWhiteBase" />
@@ -82,6 +84,7 @@
         <item name="android:colorBackgroundCacheHint">@null</item>
         <item name="android:windowIsTranslucent">true</item>
         <item name="colorControlHighlight">@color/control_highlight_color</item>
+        <item name="spinnerStyle">@style/SpinnerStyle</item>
         <item name="windowNoTitle">true</item>
     </style>
 
@@ -108,6 +111,7 @@
         <item name="colorControlNormal">@color/control_normal_color</item>
         <item name="colorControlHighlight">@color/control_highlight_color</item>
         <item name="colorPrimary">@color/light_active_color</item>
+        <item name="spinnerStyle">@style/SpinnerStyle</item>
     </style>
 
     <style name="AlertDialogTitleStyle" parent="RtlOverlay.DialogWindowTitle.AppCompat">
@@ -224,6 +228,7 @@
         <!-- Color of checkboxes, switches, buttons, etc. -->
         <item name="colorAccent">@color/pref_accent_color</item>
         <item name="colorControlHighlight">@color/control_highlight_color</item>
+        <item name="spinnerStyle">@style/SpinnerStyle</item>
     </style>
     <style name="ThemeWithActionBar" parent="ThemeWithActionBarBase" />
 
@@ -343,6 +348,12 @@
         <item name="android:paddingEnd">4dp</item>
     </style>
 
+    <!-- Spinner styles -->
+    <style name="SpinnerStyle" parent="Widget.AppCompat.Spinner">
+        <item name="android:popupBackground">@drawable/popup_bg</item>
+        <item name="android:popupElevation" tools:targetApi="21">0dp</item>
+    </style>
+
     <!-- Bubble styles -->
     <style name="TextBubbleAnimation">
         <item name="android:windowEnterAnimation">@anim/textbubble_in</item>
@@ -458,6 +469,7 @@
         <item name="colorPrimaryDark">@android:color/black</item>
         <item name="colorAccent">@color/light_active_color</item>
         <item name="colorControlHighlight">@color/control_highlight_color</item>
+        <item name="spinnerStyle">@style/SpinnerStyle</item>
 
         <!-- Remove ActionBar -->
         <item name="windowNoTitle">true</item>

chrome/android/java/res/values-v21/styles.xml

@@ -101,18 +101,18 @@
         Since ChromeActivities are not HW accelerated, they don't get fancy
         material shadows for popups. This theme sets drawable with pre-baked
         shadows to those popups to make them look better.
-        'popup_background_shadow' is a copy of 'abc_popup_background_mtrl_mult'
+        'popup_bg' is a 9-patch similar to 'abc_popup_background_mtrl_mult'
         drawable from Android support library, where it's used to simulate
         material design on earlier Android versions.
     -->
     <style name="ListPopupWindow.LowEnd" parent="android:Widget.Material.Light.ListPopupWindow">
-        <item name="android:popupBackground">@drawable/popup_background_shadow</item>
+        <item name="android:popupBackground">@drawable/popup_bg</item>
     </style>
     <style name="Spinner.LowEnd" parent="android:Widget.Material.Light.Spinner">
-        <item name="android:popupBackground">@drawable/popup_background_shadow</item>
+        <item name="android:popupBackground">@drawable/popup_bg</item>
     </style>
     <style name="AutoCompleteTextView.LowEnd" parent="android:Widget.Material.Light.AutoCompleteTextView">
-        <item name="android:popupBackground">@drawable/popup_background_shadow</item>
+        <item name="android:popupBackground">@drawable/popup_bg</item>
     </style>
     <style name="MainTheme.LowEnd" parent="MainTheme">
         <item name="android:popupWindowStyle">@style/ListPopupWindow.LowEnd</item>