Implemented most of HtmlDialogWindowController, which is a Cocoa port

chrome/browser/cocoa/browser_window_cocoa.mm

 // Copyright (c) 2009 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 "base/gfx/rect.h"
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/cocoa/browser_window_cocoa.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
 #import "chrome/browser/cocoa/clear_browsing_data_controller.h"
 #import "chrome/browser/cocoa/download_shelf_controller.h"
+#import "chrome/browser/cocoa/html_dialog_window_controller.h"
 #import "chrome/browser/cocoa/keyword_editor_cocoa_controller.h"
 #import "chrome/browser/cocoa/nsmenuitem_additions.h"
 #include "chrome/browser/cocoa/page_info_window_mac.h"
 #include "chrome/browser/cocoa/status_bubble_mac.h"
 #include "chrome/browser/cocoa/task_manager_mac.h"
 #import "chrome/browser/cocoa/theme_install_bubble_view.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/download/download_shelf.h"
 #include "chrome/browser/global_keyboard_shortcuts_mac.h"
 #include "chrome/common/notification_service.h"
@@ skipping 264 matching lines @@
 }
 
 // We allow closing the window here since the real quit decision on Mac is made
 // in [AppController quit:].
 void BrowserWindowCocoa::ConfirmBrowserCloseWithPendingDownloads() {
   browser_->InProgressDownloadResponse(true);
 }
 
 void BrowserWindowCocoa::ShowHTMLDialog(HtmlDialogUIDelegate* delegate,
                                         gfx::NativeWindow parent_window) {
-  NOTIMPLEMENTED();
+  if (!parent_window) {
+    parent_window = GetNativeHandle();
+  }
+  [HtmlDialogWindowController showHtmlDialog:delegate
+                                parentWindow:parent_window
+                                     browser:browser_];
 }
 
 void BrowserWindowCocoa::UserChangedTheme() {
   [controller_ userChangedTheme];
 }
 
 int BrowserWindowCocoa::GetExtraRenderViewHeight() const {
   // Currently this is only used on linux.
   return 0;
 }
@@ skipping 97 matching lines @@
       break;
   }
 }
 
 void BrowserWindowCocoa::DestroyBrowser() {
   [controller_ destroyBrowser];
 
   // at this point the controller is dead (autoreleased), so
   // make sure we don't try to reference it any more.
 }