Change chooser action button to use grey and blue background

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

Index: chrome/android/java/res/layout/item_chooser_dialog.xml
diff --git a/chrome/android/java/res/layout/item_chooser_dialog.xml b/chrome/android/java/res/layout/item_chooser_dialog.xml
index cf73fd4ea5921765c3cde8059a53a41f7dab9e33..f675a9b8b14f6c89e0c4e27a663bf73615953846 100644
--- a/chrome/android/java/res/layout/item_chooser_dialog.xml
+++ b/chrome/android/java/res/layout/item_chooser_dialog.xml
@@ -5,6 +5,7 @@
  -->
 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:chrome="http://schemas.android.com/apk/res-auto"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical"
@@ -67,12 +68,16 @@
         android:textSize="14sp" />
 
     <!-- Button row. -->
-    <Button
+    <org.chromium.ui.widget.ButtonCompat
         android:id="@+id/positive"
-        style="?android:attr/buttonBarButtonStyle"
         android:layout_height="wrap_content"
         android:layout_width="wrap_content"
         android:layout_gravity="end"
-        android:paddingTop="12dp"
-        android:paddingEnd="16dp" />
+        android:layout_marginTop="12dp"
+        android:layout_marginEnd="12dp"
+        android:paddingStart="16dp"
+        android:paddingEnd="16dp"
+        android:textAllCaps="true"
+        android:textColor="#fff"
+        chrome:buttonColor="@color/pref_accent_color" />
 </LinearLayout>