GTTF: Add a basic new unit test launcher.

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index e2af06bb6fa08ce659e82c173c698195304f2e0e..7646fed4d3a1ce6e7736769122bc359281af4de9 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -834,6 +834,7 @@
         'base_i18n',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
+        '../third_party/libxml/libxml.gyp:libxml',
         'third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
       ],
       'export_dependent_settings': [
@@ -864,6 +865,8 @@
         'test/expectations/expectation.h',
         'test/expectations/parser.cc',
         'test/expectations/parser.h',
+        'test/gtest_xml_util.cc',
+        'test/gtest_xml_util.h',
         'test/mock_chrome_application_mac.h',
         'test/mock_chrome_application_mac.mm',
         'test/mock_devices_changed_observer.cc',
@@ -927,6 +930,9 @@
         'test/thread_test_helper.h',
         'test/trace_event_analyzer.cc',
         'test/trace_event_analyzer.h',
+        'test/unit_test_launcher_ios.cc',
+        'test/unit_test_launcher.cc',
+        'test/unit_test_launcher.h',
         'test/values_test_util.cc',
         'test/values_test_util.h',
       ],
@@ -937,6 +943,10 @@
             # by file name rules).
             ['include', '^test/test_file_util_mac\\.cc$'],
           ],
+          'sources!': [
+            # iOS uses its own unit test launcher.
+            'test/unit_test_launcher.cc',
+          ],
         }],
       ],  # target_conditions
     },