Revert 6107 "Adds a modified copy of talk/base to webrtc/base. I..."

This breaks Chromium FYI builds and prevent roll of webrtc/libjingle to Chrome.

http://chromegw.corp.google.com/i/chromium.webrtc.fyi/builders/Win%20Builder/builds/457


> Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.
> 
> BUG=N/A
> R=andrew@webrtc.org, wu@webrtc.org
> 
> Review URL: https://webrtc-codereview.appspot.com/12199004

TBR=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/14479004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6116 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/event.h

@@ -1,51 +0,0 @@
-/*
- *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_BASE_EVENT_H__
-#define WEBRTC_BASE_EVENT_H__
-
-#if defined(WEBRTC_WIN)
-#include "webrtc/base/win32.h"  // NOLINT: consider this a system header.
-#elif defined(WEBRTC_POSIX)
-#include <pthread.h>
-#else
-#error "Must define either WEBRTC_WIN or WEBRTC_POSIX."
-#endif
-
-#include "webrtc/base/basictypes.h"
-#include "webrtc/base/common.h"
-
-namespace rtc {
-
-class Event {
- public:
-  Event(bool manual_reset, bool initially_signaled);
-  ~Event();
-
-  void Set();
-  void Reset();
-  bool Wait(int cms);
-
- private:
-  bool is_manual_reset_;
-
-#if defined(WEBRTC_WIN)
-  bool is_initially_signaled_;
-  HANDLE event_handle_;
-#elif defined(WEBRTC_POSIX)
-  bool event_status_;
-  pthread_mutex_t event_mutex_;
-  pthread_cond_t event_cond_;
-#endif
-};
-
-}  // namespace rtc
-
-#endif  // WEBRTC_BASE_EVENT_H__