Remove unused code.

pdfium.gyp

 # Copyright 2015 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'clang_use_pdfium_plugins%': 0,
@@ skipping 491 matching lines @@
       'type': 'static_library',
       'dependencies': [
         '<(libjpeg_gyp_path):libjpeg',
         'third_party/third_party.gyp:fx_lcms2',
         'third_party/third_party.gyp:fx_libopenjpeg',
         'third_party/third_party.gyp:fx_zlib',
       ],
       'sources': [
         'core/fxcodec/include/fx_codec.h',
         'core/fxcodec/include/fx_codec_def.h',
-        'core/fxcodec/include/fx_codec_flate.h',
         'core/fxcodec/codec/ccodec_basicmodule.h',
         'core/fxcodec/codec/ccodec_faxmodule.h',
         'core/fxcodec/codec/ccodec_flatemodule.h',
         'core/fxcodec/codec/ccodec_iccmodule.h',
         'core/fxcodec/codec/ccodec_jbig2module.h',
         'core/fxcodec/codec/ccodec_jpegmodule.h',
         'core/fxcodec/codec/ccodec_jpxmodule.h',
         'core/fxcodec/codec/ccodec_scanlinedecoder.h',
         'core/fxcodec/codec/codec_int.h',
         'core/fxcodec/codec/fx_codec.cpp',
@@ skipping 259 matching lines @@
         'fpdfsdk/pdfwindow/PWL_ComboBox.cpp',
         'fpdfsdk/pdfwindow/PWL_ComboBox.h',
         'fpdfsdk/pdfwindow/PWL_Edit.cpp',
         'fpdfsdk/pdfwindow/PWL_Edit.h',
         'fpdfsdk/pdfwindow/PWL_EditCtrl.cpp',
         'fpdfsdk/pdfwindow/PWL_EditCtrl.h',
         'fpdfsdk/pdfwindow/PWL_FontMap.cpp',
         'fpdfsdk/pdfwindow/PWL_FontMap.h',
         'fpdfsdk/pdfwindow/PWL_Icon.cpp',
         'fpdfsdk/pdfwindow/PWL_Icon.h',
-        'fpdfsdk/pdfwindow/PWL_IconList.cpp',
-        'fpdfsdk/pdfwindow/PWL_IconList.h',
-        'fpdfsdk/pdfwindow/PWL_Label.cpp',
-        'fpdfsdk/pdfwindow/PWL_Label.h',
         'fpdfsdk/pdfwindow/PWL_ListBox.cpp',
         'fpdfsdk/pdfwindow/PWL_ListBox.h',
-        'fpdfsdk/pdfwindow/PWL_ListCtrl.cpp',
-        'fpdfsdk/pdfwindow/PWL_ListCtrl.h',
         'fpdfsdk/pdfwindow/PWL_ScrollBar.cpp',
         'fpdfsdk/pdfwindow/PWL_ScrollBar.h',
-        'fpdfsdk/pdfwindow/PWL_Signature.cpp',
-        'fpdfsdk/pdfwindow/PWL_Signature.h',
         'fpdfsdk/pdfwindow/PWL_SpecialButton.cpp',
         'fpdfsdk/pdfwindow/PWL_SpecialButton.h',
         'fpdfsdk/pdfwindow/PWL_Utils.cpp',
         'fpdfsdk/pdfwindow/PWL_Utils.h',
         'fpdfsdk/pdfwindow/PWL_Wnd.cpp',
         'fpdfsdk/pdfwindow/PWL_Wnd.h',
       ],
     },
     {
       'target_name': 'javascript',
@@ skipping 251 matching lines @@
             'fpdfsdk/fpdfxfa/include/fpdfxfa_app.h',
             'fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h',
             'fpdfsdk/fpdfxfa/include/fpdfxfa_page.h',
             'fpdfsdk/fpdfxfa/include/fpdfxfa_util.h',
           ],
         },
       ]
     }],
   ]
 }