Filter focus for buttons when there are overlays on top

Bug: 902427
Change-Id: Ida893cf41478976f4d3784091a79385db69ef1f0
Reviewed-on: https://chromium-review.googlesource.com/c/1324450Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606212}

chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogView.java

@@ -68,6 +68,8 @@ public class PermissionDialogView {
     /* Shows the dialog */
     public void show() {
         mDialog.show();
+        getButton(DialogInterface.BUTTON_POSITIVE).setFilterTouchesWhenObscured(true);
+        getButton(DialogInterface.BUTTON_NEGATIVE).setFilterTouchesWhenObscured(true);
     }
 
     /* Dismiss the dialog */

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

@@ -32,6 +32,7 @@
         <item name="android:focusable">true</item>
         <item name="android:clickable">true</item>
         <item name="android:gravity">center_vertical|center_horizontal</item>
+        <item name="android:filterTouchesWhenObscured">true</item>
     </style>
     <style name="FilledButton" parent="ButtonCompatBase" tools:ignore="UnusedResources">
         <item name="android:paddingStart">24dp</item>