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..ff7c23868e26b99e0d5e2e7120ad26d259bc144c 100644
--- a/chrome/browser/ui/website_settings/chooser_bubble_delegate.h
+++ b/chrome/browser/ui/website_settings/chooser_bubble_delegate.h
@@ -30,13 +30,12 @@ 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. It is given to
+  // ChooserContentView at BuildBubbleUi() function.
   std::unique_ptr<ChooserController> chooser_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ChooserBubbleDelegate);