components: Create web_modal component.

chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm

 // Copyright (c) 2012 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/cocoa/extensions/native_app_window_cocoa.h"
 
 #include "base/mac/mac_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/cocoa/browser_window_utils.h"
@@ skipping 696 matching lines @@
   NOTIMPLEMENTED();
   return NULL;
 }
 
 gfx::Point NativeAppWindowCocoa::GetDialogPosition(const gfx::Size& size) {
   NOTIMPLEMENTED();
   return gfx::Point();
 }
 
 void NativeAppWindowCocoa::AddObserver(
-    WebContentsModalDialogHostObserver* observer) {
+    web_modal::WebContentsModalDialogHostObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 void NativeAppWindowCocoa::RemoveObserver(
-    WebContentsModalDialogHostObserver* observer) {
+    web_modal::WebContentsModalDialogHostObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 void NativeAppWindowCocoa::WindowWillClose() {
   [window_controller_ setAppWindow:NULL];
   shell_window_->OnNativeWindowChanged();
   shell_window_->OnNativeClose();
 }
 
 void NativeAppWindowCocoa::WindowDidBecomeKey() {
@@ skipping 72 matching lines @@
   CHECK(!window || [window isKindOfClass:[ShellNSWindow class]]);
   return static_cast<ShellNSWindow*>(window);
 }
 
 // static
 NativeAppWindow* NativeAppWindow::Create(
     ShellWindow* shell_window,
     const ShellWindow::CreateParams& params) {
   return new NativeAppWindowCocoa(shell_window, params);
 }