Refactor the PlatformContext layer to have only one class.

chrome/renderer/mock_printer_driver_win.cc

 // Copyright (c) 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 "chrome/renderer/mock_printer_driver_win.h"
 
 #include "base/gfx/gdi_util.h"
 #include "base/logging.h"
 #include "chrome/common/gfx/emf.h"
 #include "chrome/renderer/mock_printer.h"
@@ skipping 57 matching lines @@
       return NULL;
 
     void* bits;
     bitmap_ = CreateDIBSection(dc_, reinterpret_cast<BITMAPINFO*>(&header), 0,
                                &bits, NULL, 0);
     if (!bitmap_ || !bits)
       return NULL;
 
     SelectObject(dc_, bitmap_);
 
-    skia::PlatformDeviceWin::InitializeDC(dc_);
+    skia::PlatformDevice::InitializeDC(dc_);
     emf->Playback(dc_, NULL);
 
     return reinterpret_cast<uint8*>(bits);
   }
 
  private:
   HDC dc_;
   HBITMAP bitmap_;
 };
 
@@ skipping 27 matching lines @@
   if (!bitmap_data)
     return NULL;
 
   // Create a new MockPrinterPage instance and return it.
   size_t row_byte_width = rect.width() * 4;
   size_t bitmap_size = row_byte_width * rect.height();
   return new MockPrinterPage(rect.width(), rect.height(),
                              source_data, source_size,
                              bitmap_data, bitmap_size);
 }