Retrieve test data directory at run time

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': {
     # TODO(thakis): Enable this, pdfium:29
     #'chromium_code': 1,
     'pdf_use_skia%': 0,
     'pdf_enable_v8%': 1,
@@ skipping 771 matching lines @@
       'type': 'static_library',
       'dependencies': [
         '<(DEPTH)/testing/gmock.gyp:gmock',
         '<(DEPTH)/testing/gtest.gyp:gtest',
       ],
       'sources': [
         'testing/fx_string_testhelpers.cpp',
         'testing/fx_string_testhelpers.h',
         'testing/test_support.cpp',
         'testing/test_support.h',
+        'testing/utils/path_service.cpp',
       ],
       'conditions': [
         ['pdf_enable_v8==1', {
           'include_dirs': [
             '<(DEPTH)/v8',
             '<(DEPTH)/v8/include',
           ],
           'dependencies': [
             '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
             '<(DEPTH)/v8/tools/gyp/v8.gyp:v8_libplatform',
           ],
         }],
       ],
     },
   ],
 }