Polychrome: restrict Mac-specific |BuildBubbleUi| to Cocoa

Bug: 804950
Change-Id: I931bfdeefeefbbdbda626905dd14afe83e438821
Reviewed-on: https://chromium-review.googlesource.com/966929Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543769}

chrome/browser/ui/cocoa/permission_bubble/chooser_bubble_ui_views_mac.mm

@@ -17,14 +17,6 @@
 #include "chrome/browser/ui/permission_bubble/chooser_bubble_delegate.h"
 #include "ui/views/bubble/bubble_dialog_delegate.h"
 
-std::unique_ptr<BubbleUi> ChooserBubbleDelegate::BuildBubbleUi() {
-  if (!chrome::ShowAllDialogsWithViewsToolkit()) {
-    return std::make_unique<ChooserBubbleUiCocoa>(
-        browser_, std::move(chooser_controller_));
-  }
-  return std::make_unique<ChooserBubbleUi>(browser_,
-                                           std::move(chooser_controller_));
-}
 
 void ChooserBubbleUi::CreateAndShowCocoa(
     views::BubbleDialogDelegateView* delegate) {
@@ -41,4 +33,13 @@ void ChooserBubbleUi::CreateAndShowCocoa(
 void ChooserBubbleUi::CreateAndShow(views::BubbleDialogDelegateView* delegate) {
   CreateAndShowCocoa(delegate);
 }
+
+std::unique_ptr<BubbleUi> ChooserBubbleDelegate::BuildBubbleUi() {
+  if (!chrome::ShowAllDialogsWithViewsToolkit()) {
+    return std::make_unique<ChooserBubbleUiCocoa>(
+        browser_, std::move(chooser_controller_));
+  }
+  return std::make_unique<ChooserBubbleUi>(browser_,
+                                           std::move(chooser_controller_));
+}
 #endif