Refactor the PlatformContext layer to have only one class.

chrome/browser/printing/printing_layout_uitest.cc

 // Copyright (c) 2006-2009 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 "base/command_line.h"
 #include "base/file_util.h"
 #include "base/gfx/gdi_util.h"
 #include "skia/ext/platform_device.h"
 #include "base/gfx/png_decoder.h"
 #include "base/gfx/png_encoder.h"
@@ skipping 151 matching lines @@
     EXPECT_NE(rect.width(), 0);
     EXPECT_NE(rect.height(), 0);
     size_ = rect.size();
     gfx::CreateBitmapV4Header(rect.width(), rect.height(), &hdr);
     void* bits;
     HBITMAP bitmap = CreateDIBSection(hdc,
                                       reinterpret_cast<BITMAPINFO*>(&hdr), 0,
                                       &bits, NULL, 0);
     EXPECT_TRUE(bitmap);
     EXPECT_TRUE(SelectObject(hdc, bitmap));
-    skia::PlatformDeviceWin::InitializeDC(hdc);
+    skia::PlatformDevice::InitializeDC(hdc);
     EXPECT_TRUE(emf.Playback(hdc, NULL));
     row_length_ = size_.width() * sizeof(uint32);
     size_t bytes = row_length_ * size_.height();
     ASSERT_TRUE(bytes);
     data_.resize(bytes);
     memcpy(&*data_.begin(), bits, bytes);
     DeleteDC(hdc);
     DeleteObject(bitmap);
   }
 
@@ skipping 432 matching lines @@
 
     // Force a navigation elsewhere to verify that it's fine with it.
     url = server->TestServerPage("files/printing/test1.html");
     EXPECT_EQ(AUTOMATION_MSG_NAVIGATION_SUCCESS,
               tab_proxy->NavigateToURL(url));
   }
   CloseBrowserAndServer();
 
   EXPECT_EQ(0., CompareWithResult(L"iframe")) << L"iframe";
 }