Clean up fx_ge.h and IWYU.

fpdfsdk/cfx_systemhandler.cpp

 // Copyright 2016 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 "fpdfsdk/cfx_systemhandler.h"
 
+#include "core/fxge/include/fx_ge.h"
 #include "fpdfsdk/formfiller/cffl_formfiller.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
 
 namespace {
 
 int CharSet2CP(int charset) {
   if (charset == 128)
     return 932;
   if (charset == 134)
     return 936;
@@ skipping 110 matching lines @@
   return !!m_pEnv->FFI_IsSHIFTKeyDown(nFlag);
 }
 
 bool CFX_SystemHandler::IsCTRLKeyDown(uint32_t nFlag) const {
   return !!m_pEnv->FFI_IsCTRLKeyDown(nFlag);
 }
 
 bool CFX_SystemHandler::IsALTKeyDown(uint32_t nFlag) const {
   return !!m_pEnv->FFI_IsALTKeyDown(nFlag);
 }