Implement confirm bubble for Mac.

chrome/browser/ui/cocoa/confirm_bubble_model.mm

+// Copyright (c) 2011 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.
+
+#include "chrome/browser/ui/confirm_bubble_model.h"
+
+#include "chrome/browser/ui/cocoa/confirm_bubble_controller.h"
+#include "ui/gfx/point.h"
+
+void ConfirmBubbleModel::Show(gfx::NativeView view,

[Robert Sesek, 2011/12/15 18:47:09]

This could probably just go in the controller.mm file if you wanted.

[Hironori Bono, 2012/01/05 10:45:55]

Thanks for your suggestion. I would like to talk with developers of other
platforms (Win, GTK, Views) to find a consistent solution.

+                              const gfx::Point& origin,
+                              ConfirmBubbleModel* model) {
+  // Create a custom NSViewController that manages a bubble view, and add it to
+  // a child to the specified view. This controller will be automatically
+  // deleted when it loses first-responder status.
+  ConfirmBubbleController* controller =
+      [[ConfirmBubbleController alloc] initWithParent:view
+                                               origin:origin.ToCGPoint()
+                                                model:model];
+  [view addSubview:[controller view]
+        positioned:NSWindowAbove
+        relativeTo:nil];
+  [[view window] makeFirstResponder:[controller view]];
+}