Hook up the default v8::Platform implementation to pdfium

pdfium.gyp

 {
   'variables': {
     'win_third_party_warn_as_error': 'false',
     'pdf_use_skia%': 0,
   },
   'target_defaults': {
     'defines' : [
       'FOXIT_CHROME_BUILD',
       '_FXFT_VERSION_=2501',
       '_FPDFSDK_LIB',
@@ skipping 739 matching lines @@
         'fpdfsdk/src/pdfwindow/PWL_Signature.cpp',
         'fpdfsdk/src/pdfwindow/PWL_SpecialButton.cpp',
         'fpdfsdk/src/pdfwindow/PWL_Utils.cpp',
         'fpdfsdk/src/pdfwindow/PWL_Wnd.cpp',
       ],
     },
     {
       'target_name': 'javascript',
       'type': 'static_library',
         'include_dirs': [
+          '<(DEPTH)/v8',
           '<(DEPTH)/v8/include',
         ],
       'dependencies': [
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
+        '<(DEPTH)/v8/tools/gyp/v8.gyp:v8_libplatform',
       ],
       'export_dependent_settings': [
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
       ],
       'ldflags': [ '-L<(PRODUCT_DIR)',],
       'sources': [
         'fpdfsdk/include/javascript/app.h',
         'fpdfsdk/include/javascript/color.h',
         'fpdfsdk/include/javascript/console.h',
         'fpdfsdk/include/javascript/Consts.h',
@@ skipping 40 matching lines @@
     {
       'target_name': 'jsapi',
       'type': 'static_library',
       'dependencies': [
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
       ],
       'export_dependent_settings': [
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
       ],
       'include_dirs': [
+        '<(DEPTH)/v8',
         '<(DEPTH)/v8/include',
       ],
       'ldflags': [ '-L<(PRODUCT_DIR)',],
       'sources': [
         'fpdfsdk/include/jsapi/fxjs_v8.h',
         'fpdfsdk/src/jsapi/fxjs_v8.cpp',
       ],
     },
     {
       'target_name': 'formfiller',
@@ skipping 20 matching lines @@
         'fpdfsdk/src/formfiller/FFL_ListBox.cpp',
         'fpdfsdk/src/formfiller/FFL_Notify.cpp',
         'fpdfsdk/src/formfiller/FFL_PushButton.cpp',
         'fpdfsdk/src/formfiller/FFL_RadioButton.cpp',
         'fpdfsdk/src/formfiller/FFL_TextField.cpp',
         'fpdfsdk/src/formfiller/FFL_Utils.cpp',
       ],
     },
   ],
 }