Change ChooserController ownership model

chrome/browser/ui/website_settings/chooser_bubble_delegate.h

Index: chrome/browser/ui/website_settings/chooser_bubble_delegate.h
diff --git a/chrome/browser/ui/website_settings/chooser_bubble_delegate.h b/chrome/browser/ui/website_settings/chooser_bubble_delegate.h
index bafc894c2a86aaf14d253150531a385f1126dde6..7e5353ffba94ff16b91ff138173345234c786100 100644
--- a/chrome/browser/ui/website_settings/chooser_bubble_delegate.h
+++ b/chrome/browser/ui/website_settings/chooser_bubble_delegate.h
@@ -30,13 +30,14 @@ class ChooserBubbleDelegate : public BubbleDelegate {
   std::unique_ptr<BubbleUi> BuildBubbleUi() override;
   const content::RenderFrameHost* OwningFrame() const override;
 
-  ChooserController* chooser_controller() const {
-    return chooser_controller_.get();
-  }
-
  private:
   const content::RenderFrameHost* const owning_frame_;
   Browser* browser_;
+  // |chooser_controller_| is not owned by this class, it is owned by
+  // ChooserContentView(non-Mac)/ChooserContentViewCocoa(Mac).
+  // This field only temporarily owns the ChooserController. It is moved
+  // into the ChooserContentView/ChooserContentViewCocoa when
+  // BuildBubbleUi() is called and the bubble is shown.
   std::unique_ptr<ChooserController> chooser_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ChooserBubbleDelegate);