Corrently exclude FontCustomPlatformDataWin for non-GDI
Corrently exclude FontCustomPlatformDataWin for non-GDI

Change blink_platform.gyp to correctly exclude
FontCustomPlatformDataWin.cpp.

R=dglazkov@chromium.org
BUG=

Review URL: https://codereview.chromium.org/109833003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@163990 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs