Implement platform_util::OpenExternal on ChromeOS

chrome/browser/ui/apps/chrome_shell_window_delegate.cc

 // Copyright 2013 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/apps/chrome_shell_window_delegate.h"
 
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/file_select_helper.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
@@ skipping 73 matching lines @@
   return new_tab_params.target_contents;
 }
 
 void ChromeShellWindowDelegate::AddNewContents(
     Profile* profile,
     content::WebContents* new_contents,
     WindowOpenDisposition disposition,
     const gfx::Rect& initial_pos,
     bool user_gesture,
     bool* was_blocked) {
-#if defined(OS_MACOSX) || defined(OS_WIN) || \
-    (defined(OS_LINUX) && !defined(OS_CHROMEOS))
   if (!disable_external_open_for_testing_) {
     new_contents->SetDelegate(new ShellWindowLinkDelegate());
     return;
   }
-#endif
   Browser* browser =
       chrome::FindOrCreateTabbedBrowser(profile, chrome::GetActiveDesktop());
   // Force all links to open in a new tab, even if they were trying to open a
   // new window.
   disposition =
       disposition == NEW_BACKGROUND_TAB ? disposition : NEW_FOREGROUND_TAB;
   chrome::AddWebContents(browser, NULL, new_contents, disposition, initial_pos,
                          user_gesture, was_blocked);
 }
 
@@ skipping 36 matching lines @@
         host->GetRoutingID(), blocked));
   }
 }
 
 bool ChromeShellWindowDelegate::IsWebContentsVisible(
     content::WebContents* web_contents) {
   return platform_util::IsVisible(web_contents->GetView()->GetNativeView());
 }
 
 }  // namespace chrome