The ws2_32.dll is needed by JingleThreadWrapper for WebRTC and Chromoting.

chrome/renderer/chrome_render_process_observer.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/renderer/chrome_render_process_observer.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
@@ skipping 204 matching lines @@
     // any security modules so it is safe to disable the fork check in NSS.
     crypto::DisableNSSForkCheck();
     crypto::ForceNSSNoDBInit();
     crypto::EnsureNSSInit();
   }
 #elif defined(OS_WIN)
   // crypt32.dll is used to decode X509 certificates for Chromoting.
   // Only load this library when the feature is enabled.
   std::string error;
   base::LoadNativeLibrary(FilePath(L"crypt32.dll"), &error);
+  // ws2_32.dll is used by JingleThreadWrapper for WebRTC and Chromoting.
+
+  // TODO(ronghuawu): Remove this once we can get rid of the dependency to
+  // SocketServer (which uses WSACreateEvent) from JingleThreadWrapper.
+  // http://crbug.com/115702
+  base::LoadNativeLibrary(FilePath(L"ws2_32.dll"), &error);
 #endif
 
   // Note that under Linux, the media library will normally already have
   // been initialized by the Zygote before this instance became a Renderer.
   FilePath media_path;
   PathService::Get(chrome::DIR_MEDIA_LIBS, &media_path);
   if (!media_path.empty())
     media::InitializeMediaLibrary(media_path);
 }
 
@@ skipping 151 matching lines @@
   if (clear_cache_pending_) {
     clear_cache_pending_ = false;
     WebCache::clear();
   }
 }
 
 const RendererContentSettingRules*
 ChromeRenderProcessObserver::content_setting_rules() const {
   return &content_setting_rules_;
 }