Fix non-components Win Debug build of extensions_unittests

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

extensions/extensions.gyp

@@ -726,6 +726,13 @@
         'test/test_permissions_provider.cc',
         'test/test_permissions_provider.h',
       ],
+      'conditions': [
+        ['OS=="win" and win_use_allocator_shim==1', {
+          'dependencies': [
+            '../base/allocator/allocator.gyp:allocator',
+          ],
+        }],
+      ],
       'actions': [
         {
           'action_name': 'repack_components_pack',