Adding support for .txt files.

chrome/browser/platform_util_chromeos.cc

 // 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 "chrome/browser/platform_util.h"
 
 #include <gtk/gtk.h>
 
 #include "app/gtk_util.h"
 #include "base/file_util.h"
@@ skipping 32 matching lines @@
 }
 
 void OpenItem(const FilePath& full_path) {
   std::string ext = full_path.Extension();
   // For things supported natively by the browser, we should open it
   // in a tab.
   if (ext == ".jpg" ||
       ext == ".jpeg" ||
       ext == ".png" ||
       ext == ".gif" ||
+      ext == ".txt" ||
       ext == ".html" ||
       ext == ".htm") {
     std::string path;
     path = "file://";
     path.append(full_path.value());
     if (!ChromeThread::CurrentlyOn(ChromeThread::UI)) {
       bool result = ChromeThread::PostTask(
           ChromeThread::UI, FROM_HERE,
           NewRunnableFunction(&OpenItem, full_path));
       DCHECK(result);
       return;
     }
     Browser* browser = BrowserList::GetLastActive();
     browser->AddTabWithURL(
         GURL(path), GURL(), PageTransition::LINK, -1, Browser::ADD_SELECTED,
         NULL, std::string());
     return;
   }
   if (ext == ".avi" ||
+      ext == ".wav" ||
       ext == ".mp4" ||
       ext == ".mp3" ||
       ext == ".mkv" ||
       ext == ".ogg") {
     MediaPlayer* mediaplayer = MediaPlayer::Get();
     std::string url = "file://";
     url += full_path.value();
     GURL gurl(url);
     mediaplayer->EnqueueMediaURL(gurl, NULL);
     return;
@@ skipping 10 matching lines @@
 void OpenExternal(const GURL& url) {
   if (url.SchemeIs("mailto")) {
     std::string string_url = kGmailComposeUrl;
     string_url.append(url.spec());
     ChromeThread::PostTask(
         ChromeThread::UI, FROM_HERE, NewRunnableFunction(OpenURL, string_url));
   }
 }
 
 }  // namespace platform_util