Keep only base/extractor.[cc|h].

third_party/breakpad/src/client/windows/common/auto_critical_section.h

-// Copyright (c) 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__
-#define CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__
-
-#include <Windows.h>
-
-namespace google_breakpad {
-
-// Automatically enters the critical section in the constructor and leaves
-// the critical section in the destructor.
-class AutoCriticalSection {
- public:
-  // Creates a new instance with the given critical section object
-  // and enters the critical section immediately.
-  explicit AutoCriticalSection(CRITICAL_SECTION* cs) : cs_(cs) {
-    assert(cs_);
-    EnterCriticalSection(cs_);
-  }
-
-  // Destructor: leaves the critical section.
-  ~AutoCriticalSection() {
-    LeaveCriticalSection(cs_);
-  }
-
- private:
-  // Disable copy ctor and operator=.
-  AutoCriticalSection(const AutoCriticalSection&);
-  AutoCriticalSection& operator=(const AutoCriticalSection&);
-
-  CRITICAL_SECTION* cs_;
-};
-
-}  // namespace google_breakpad
-
-#endif  // CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__