Extract a minimal subset of WebDialogUI/WebDialogDelegate from src/chrome -> src/ui/web_dialogs

chrome/browser/ui/browser.cc

 // 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/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 1447 matching lines @@
                              const gfx::Rect& initial_pos,
                              bool user_gesture) {
   AddNewContents(NULL, new_contents, disposition, initial_pos, user_gesture);
 }
 
 void Browser::CloseTabContents(WebContents* contents) {
   CloseContents(contents);
 }
 
 gfx::NativeWindow Browser::BrowserShowWebDialog(
-    WebDialogDelegate* delegate,
+    web_dialogs::WebDialogDelegate* delegate,
     gfx::NativeWindow parent_window) {
   if (!parent_window)
     parent_window = window_->GetNativeHandle();
 
   return browser::ShowWebDialog(parent_window, profile_, this, delegate);
 }
 
 void Browser::BrowserRenderWidgetShowing() {
   RenderWidgetShowing();
 }
@@ skipping 4028 matching lines @@
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         content::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }