Convert ValidationMessageBubbleView to BubbleDialogDelegate

chrome/browser/ui/cocoa/validation_message_bubble_cocoa.h

Index: chrome/browser/ui/cocoa/validation_message_bubble_cocoa.h
diff --git a/chrome/browser/ui/cocoa/validation_message_bubble_cocoa.h b/chrome/browser/ui/cocoa/validation_message_bubble_cocoa.h
index 3defb6793b8bc5ae4f70b7fbcea433b0e324cafe..1357fd0e777bbd9ad6b48cbdbafd2a6ac73802d3 100644
--- a/chrome/browser/ui/cocoa/validation_message_bubble_cocoa.h
+++ b/chrome/browser/ui/cocoa/validation_message_bubble_cocoa.h
@@ -7,6 +7,7 @@
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/validation_message_bubble.h"
 
 @class ValidationMessageBubbleController;
@@ -15,7 +16,9 @@ namespace content {
 class WebContents;
 }
 
-class ValidationMessageBubbleCocoa : public ValidationMessageBubble {
+class ValidationMessageBubbleCocoa
+    : public ValidationMessageBubble,
+      public base::SupportsWeakPtr<ValidationMessageBubbleCocoa> {
  public:
   ValidationMessageBubbleCocoa(content::WebContents* web_contents,
                                const gfx::Rect& anchor_in_root_view,
@@ -27,6 +30,7 @@ class ValidationMessageBubbleCocoa : public ValidationMessageBubble {
   void SetPositionRelativeToAnchor(
       content::RenderWidgetHost* widget_host,
       const gfx::Rect& anchor_in_root_view) override;
+  void CloseValidationMessage() override;
 
  private:
   base::scoped_nsobject<ValidationMessageBubbleController> controller_;