Center permission bubble if location bar is hidden in MacOS.

chrome/browser/ui/cocoa/website_settings/permission_bubble_cocoa.h

Index: chrome/browser/ui/cocoa/website_settings/permission_bubble_cocoa.h
diff --git a/chrome/browser/ui/cocoa/website_settings/permission_bubble_cocoa.h b/chrome/browser/ui/cocoa/website_settings/permission_bubble_cocoa.h
index de6816fcb6d9cca53ab606c0c97e70b30ca9b2be..140af2062a880dd7beb8864a1986c521b948315d 100644
--- a/chrome/browser/ui/cocoa/website_settings/permission_bubble_cocoa.h
+++ b/chrome/browser/ui/cocoa/website_settings/permission_bubble_cocoa.h
@@ -8,6 +8,7 @@
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/ui/cocoa/info_bubble_view.h"
 #include "chrome/browser/ui/website_settings/permission_bubble_view.h"
 #include "content/public/browser/web_contents.h"
 
@@ -43,7 +44,13 @@ class PermissionBubbleCocoa : public PermissionBubbleView {
   // Change the parent window to be used the next time the bubble is shown.
   void SwitchParentWindow(NSWindow* parent);
 
-private:
+  info_bubble::BubbleArrowLocation GetArrowLocation();
+
+ protected:
+  // Should only be called in this class. Protected/virtual for ease of testing.
+  virtual bool HasLocationBar();
+
+ private:
   NSWindow* parent_window_;  // Weak.
   Delegate* delegate_;  // Weak.