Move the "platform" wrappers in skia/ext to the skia namespace.

skia/ext/platform_device_win.cc

 // Copyright (c) 2006-2008 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 "skia/ext/platform_device_win.h"
 
 #include "base/logging.h"
 #include "skia/ext/skia_utils_win.h"
 #include "SkMatrix.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkUtils.h"
 
-namespace gfx {
-
-// TODO(brettw) remove this when this file is moved into the Skia namespace.
-using namespace skia;
+namespace skia {
 
 PlatformDeviceWin::PlatformDeviceWin(const SkBitmap& bitmap)
     : SkDevice(bitmap) {
 }
 
 // static
 void PlatformDeviceWin::InitializeDC(HDC context) {
   // Enables world transformation.
   // If the GM_ADVANCED graphics mode is set, GDI always draws arcs in the
   // counterclockwise direction in logical space. This is equivalent to the
@@ skipping 193 matching lines @@
     path.transform(transformation);
     LoadPathToDC(context, path);
     hrgn = PathToRegion(context);
   }
   int result = SelectClipRgn(context, hrgn);
   DCHECK_NE(result, ERROR);
   result = DeleteObject(hrgn);
   DCHECK_NE(result, 0);
 }
 
-}  // namespace gfx
+}  // namespace skia