Re-implement form validation message UI with native widgets (Views)

chrome/browser/ui/views/validation_message_bubble_delegate.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_VALIDATION_MESSAGE_BUBBLE_DELEGATE_H_
+#define CHROME_BROWSER_UI_VIEWS_VALIDATION_MESSAGE_BUBBLE_DELEGATE_H_
+
+#include "ui/views/bubble/bubble_delegate.h"
+
+// A BubbleDelegateView implementation for form validation message bubble.
+// This class is exposed for testing.
+class ValidationMessageBubbleDelegate : public views::BubbleDelegateView {
+ public:
+  // An interface to observe the widget closing.
+  class Observer {
+   public:
+    virtual void WindowClosing() = 0;
+
+   protected:
+    virtual ~Observer() {}
+  };
+
+  static const int kWindowMinWidth;
+  static const int kWindowMaxWidth;
+
+  ValidationMessageBubbleDelegate(const gfx::Rect& anchor_in_screen,
+                                  const string16& main_text,
+                                  const string16& sub_text,
+                                  Observer* observer);
+  virtual ~ValidationMessageBubbleDelegate();
+
+  void Hide();
+
+  // BubbleDelegateView overrides:
+  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual void DeleteDelegate() OVERRIDE;
+  virtual void WindowClosing() OVERRIDE;
+
+ private:
+  Observer* observer_;
+  int width_;
+  int height_;
+
+  DISALLOW_COPY_AND_ASSIGN(ValidationMessageBubbleDelegate);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_VALIDATION_MESSAGE_BUBBLE_DELEGATE_H_