Consolidate test support code.

pdfium.gyp

 {
   'variables': {
     'pdf_use_skia%': 0,
     'pdf_enable_v8%': 1,
     'conditions': [
       ['OS=="linux"', {
         'bundle_freetype%': 0,
       }, {  # On Android there's no system FreeType. On Windows and Mac, only a
             # few methods are used from it.
         'bundle_freetype%': 1,
@@ skipping 703 matching lines @@
         'fpdfsdk/src/formfiller/FFL_Utils.cpp',
       ],
     },
     {
       'target_name': 'pdfium_unittests',
       'type': 'executable',
       'dependencies': [
         '<(DEPTH)/testing/gtest.gyp:gtest_main',
         '<(DEPTH)/testing/gtest.gyp:gtest',
         'pdfium',
+        'test_support',
       ],
       'include_dirs': [
         '<(DEPTH)'
       ],
       'sources': [
         'core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp',
         'core/src/fxcrt/fx_basic_bstring_unittest.cpp',
         'core/src/fxcrt/fx_basic_memmgr_unittest.cpp',
         'core/src/fxcrt/fx_basic_wstring_unittest.cpp',
         'core/src/fxcrt/fx_bidi_unittest.cpp',
         'core/src/fxcrt/fx_system_unittest.cpp',
         'testing/fx_string_testhelpers.h',
         'testing/fx_string_testhelpers.cpp',
         'third_party/base/nonstd_unique_ptr_unittest.cpp',
       ],
     },
     {
       'target_name': 'pdfium_embeddertests',
       'type': 'executable',
       'dependencies': [
         '<(DEPTH)/testing/gmock.gyp:gmock',
         '<(DEPTH)/testing/gtest.gyp:gtest',
         'pdfium',
+        'test_support',
       ],
       'include_dirs': [
         '<(DEPTH)',
       ],
       'sources': [
         'core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_embeddertest.cpp',
         'core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp',
         'fpdfsdk/src/fpdf_dataavail_embeddertest.cpp',
         'fpdfsdk/src/fpdfdoc_embeddertest.cpp',
         'fpdfsdk/src/fpdfformfill_embeddertest.cpp',
         'fpdfsdk/src/fpdftext_embeddertest.cpp',
         'fpdfsdk/src/fpdfview_c_api_test.c',
         'fpdfsdk/src/fpdfview_c_api_test.h',
         'fpdfsdk/src/fpdfview_embeddertest.cpp',
         'testing/embedder_test.cpp',
         'testing/embedder_test.h',
         'testing/embedder_test_mock_delegate.h',
         'testing/embedder_test_timer_handling_delegate.h',
-        'testing/fx_string_testhelpers.cpp',
-        'testing/fx_string_testhelpers.h',
       ],
       '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',
           ],
           'sources': [
             'fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp',
           ],
         }],
       ],
     },
+    {
+      'target_name': 'test_support',
+      'type': 'static_library',
+      'dependencies': [
+        '<(DEPTH)/testing/gmock.gyp:gmock',
+        '<(DEPTH)/testing/gtest.gyp:gtest',
+      ],
+      'include_dirs': [
+        '<(DEPTH)',
+      ],
+      'sources': [
+        'testing/fx_string_testhelpers.cpp',
+        'testing/fx_string_testhelpers.h',
+        'testing/test_support.cpp',
+        'testing/test_support.h',
+      ],
+      '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',
+          ],
+        }],
+      ],
+    },
   ],
 }