Fix copy&paste bug in gtest.gyp.

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/441873008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

testing/gtest.gyp

@@ -37,9 +37,6 @@
         'gtest/src/gtest-test-part.cc',
         'gtest/src/gtest-typed-test.cc',
         'gtest/src/gtest.cc',
-        'multiprocess_func_list.cc',
-        'multiprocess_func_list.h',
-        'platform_test.h',
       ],
       'sources!': [
         'gtest/src/gtest-all.cc',  # Not needed by our build.