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It needs to depend on the allocator gyp target to pick up the
/NODEFAULTLIBS flags for libcmt.lib and libcmtd.lib and avoid
link errors about multiple definitions of allocation related
symbols.

BUG=
TEST=extensions_unittests links in non-components Debug build on Win

Review URL: https://codereview.chromium.org/394353008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284632 0039d316-1c4b-4281-b951-d872f2087c98