Deleted OS_WIN and all Windows specific files from base.

base/win/scoped_hdc.h

-// 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.
-
-#ifndef BASE_WIN_SCOPED_HDC_H_
-#define BASE_WIN_SCOPED_HDC_H_
-
-#include <windows.h>
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-#include "base/win/scoped_handle.h"
-
-namespace base {
-namespace win {
-
-// Like ScopedHandle but for HDC.  Only use this on HDCs returned from
-// GetDC.
-class ScopedGetDC {
- public:
-  explicit ScopedGetDC(HWND hwnd)
-      : hwnd_(hwnd),
-        hdc_(GetDC(hwnd)) {
-    if (hwnd_) {
-      DCHECK(IsWindow(hwnd_));
-      DCHECK(hdc_);
-    } else {
-      // If GetDC(NULL) returns NULL, something really bad has happened, like
-      // GDI handle exhaustion.  In this case Chrome is going to behave badly no
-      // matter what, so we may as well just force a crash now.
-      CHECK(hdc_);
-    }
-  }
-
-  ~ScopedGetDC() {
-    if (hdc_)
-      ReleaseDC(hwnd_, hdc_);
-  }
-
-  operator HDC() { return hdc_; }
-
- private:
-  HWND hwnd_;
-  HDC hdc_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedGetDC);
-};
-
-// Like ScopedHandle but for HDC.  Only use this on HDCs returned from
-// CreateCompatibleDC, CreateDC and CreateIC.
-class CreateDCTraits {
- public:
-  typedef HDC Handle;
-
-  static bool CloseHandle(HDC handle) {
-    return ::DeleteDC(handle) != FALSE;
-  }
-
-  static bool IsHandleValid(HDC handle) {
-    return handle != NULL;
-  }
-
-  static HDC NullHandle() {
-    return NULL;
-  }
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(CreateDCTraits);
-};
-
-typedef GenericScopedHandle<CreateDCTraits, DummyVerifierTraits> ScopedCreateDC;
-
-}  // namespace win
-}  // namespace base
-
-#endif  // BASE_WIN_SCOPED_HDC_H_