Move ifx_renderdevicedriver to a separate file to share

core/fxge/win32/fx_win32_device.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fxge/include/fx_ge.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 737 matching lines @@
   }
   if (m_DeviceClass != FXDC_DISPLAY) {
     m_RenderCaps = FXRC_BIT_MASK;
   } else {
     m_RenderCaps = FXRC_GET_BITS | FXRC_BIT_MASK;
   }
 }
 
 CGdiDeviceDriver::~CGdiDeviceDriver() {}
 
-int CGdiDeviceDriver::GetDeviceCaps(int caps_id) {
+int CGdiDeviceDriver::GetDeviceCaps(int caps_id) const {
   switch (caps_id) {
     case FXDC_DEVICE_CLASS:
       return m_DeviceClass;
     case FXDC_PIXEL_WIDTH:
       return m_Width;
     case FXDC_PIXEL_HEIGHT:
       return m_Height;
     case FXDC_BITS_PIXEL:
       return m_nBitsPerPixel;
     case FXDC_RENDER_CAPS:
@@ skipping 660 matching lines @@
   if (m_hDC) {
     SelectObject(m_hDC, m_hOldBitmap);
     DeleteDC(m_hDC);
   }
   if (m_hBitmap)
     DeleteObject(m_hBitmap);
   delete GetBitmap();
 }
 
 #endif  // _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_