Implement confirm bubble for Mac.

chrome/browser/ui/cocoa/confirm_bubble_controller.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_COCOA_CONFIRM_BUBBLE_CONTROLLER_H_
+#define CHROME_BROWSER_UI_COCOA_CONFIRM_BUBBLE_CONTROLLER_H_
+#pragma once
+
+#import <Cocoa/Cocoa.h>
+
+#import "base/mac/cocoa_protocols.h"
+
+class ConfirmBubbleModel;
+
+// A view controller that manages a bubble view and becomes a proxy between
+// the view and the ConfirmBubbleModel object. This class is internally used
+// in ConfirmBubbleView::Show() and users do not have to change this class
+// directly.
+@interface ConfirmBubbleController :
+    NSViewController<NSTextViewDelegate> {
+ @private
+  NSView* parent_;  // weak
+  CGPoint origin_;
+  ConfirmBubbleModel* model_;  // weak
+}
+
+// Creates a ConfirmBubbleController object.
+- (id)initWithParent:(NSView*)parent
+              origin:(CGPoint)origin
+               model:(ConfirmBubbleModel*)model;
+
+// Access to the properties of the ConfirmBubbleModel object. These functions
+// also converts C++ variables returned by the ConfirmBubbleModel object to
+// Objective-C variables.

[Robert Sesek, 2011/12/12 15:42:43]

nit: they convert from C++ types to Obj-C types, not variables

[Hironori Bono, 2011/12/15 13:06:14]

Done. Thanks for your comment. I have updated this comment and the one in
confirm_bubble_controller.mm.

+- (NSPoint)origin;
+- (NSString*)title;
+- (NSString*)messageText;
+- (NSString*)linkText;
+- (NSString*)okButton;

[Robert Sesek, 2011/12/12 15:42:43]

Seeing this in code, this name makes it seem like it's returning NSButton*. I'd
recommend |-okButtonText| and |-cancelButtonText|.

[Hironori Bono, 2011/12/15 13:06:14]

Done. It also makes sense to me.

+- (NSString*)cancelButton;
+- (BOOL)hasOkButton;
+- (BOOL)hasCancelButton;
+- (NSImage*)icon;
+
+// Handle actions from from the ConfirmBubbleView objet.
+- (void)accept;
+- (void)cancel;
+- (void)linkClicked;
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_CONFIRM_BUBBLE_CONTROLLER_H_