Upstream chromium side of modal dialogs for webview.

android_webview/native/aw_web_contents_delegate.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_DELEGATE_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_DELEGATE_H_
 
 #include <jni.h>
 
 #include "chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.h"
 
 namespace android_webview {
 
 // WebView specific WebContentsDelegate.
 // Should contain WebContentsDelegate code required by WebView that should not
 // be part of the Chromium Android port.
 class AwWebContentsDelegate
     : public web_contents_delegate_android::WebContentsDelegateAndroid {
  public:
   AwWebContentsDelegate(JNIEnv* env, jobject obj);
   virtual ~AwWebContentsDelegate();
+  virtual content::JavaScriptDialogCreator* GetJavaScriptDialogCreator()
+      OVERRIDE;
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_DELEGATE_H_