Convert ValidationMessageBubbleView to BubbleDialogDelegate

chrome/browser/ui/views/validation_message_bubble_view.h

Index: chrome/browser/ui/views/validation_message_bubble_view.h
diff --git a/chrome/browser/ui/views/validation_message_bubble_view.h b/chrome/browser/ui/views/validation_message_bubble_view.h
index 3d2f3a05fdbcc8372dcbf86df43fb0e98ea381b5..b496b5bbb7a7200b28f3b5c97229f5045f40f7ad 100644
--- a/chrome/browser/ui/views/validation_message_bubble_view.h
+++ b/chrome/browser/ui/views/validation_message_bubble_view.h
@@ -6,8 +6,10 @@
 #define CHROME_BROWSER_UI_VIEWS_VALIDATION_MESSAGE_BUBBLE_VIEW_H_
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/validation_message_bubble.h"
-#include "chrome/browser/ui/views/validation_message_bubble_delegate.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/views/bubble/bubble_dialog_delegate.h"
 
 namespace content {
 class WebContents;
@@ -15,8 +17,9 @@ class WebContents;
 
 // A ValidationMessageBubble implementation for Views.
 class ValidationMessageBubbleView
-    : public ValidationMessageBubble,
-      public ValidationMessageBubbleDelegate::Observer {
+    : public views::BubbleDialogDelegateView,
+      public ValidationMessageBubble,
+      public base::SupportsWeakPtr<ValidationMessageBubbleView> {
  public:
   ValidationMessageBubbleView(content::WebContents* web_contents,
                               const gfx::Rect& anchor_in_root_view,
@@ -24,16 +27,18 @@ class ValidationMessageBubbleView
                               const base::string16& sub_text);
   ~ValidationMessageBubbleView() override;
 
+  // BubbleDialogDelegateView overrides:
+  gfx::Size GetPreferredSize() const override;
+  int GetDialogButtons() const override;
+
   // ValidationMessageBubble overrides:
   void SetPositionRelativeToAnchor(
       content::RenderWidgetHost* widget_host,
       const gfx::Rect& anchor_in_root_view) override;
-
-  // ValidationMessageBubbleDelegate::Observer overrides:
-  void WindowClosing() override;
+  void CloseValidationMessage() override;
 
  private:
-  ValidationMessageBubbleDelegate* delegate_;
+  gfx::Size size_;
 
   DISALLOW_COPY_AND_ASSIGN(ValidationMessageBubbleView);
 };