Add font_render_params.cc to ui/gfx/BUILD.gn.

Fixes r282703.

BUG=none
R=brettw@chromium.org
TBR=msw@chromium.org

Review URL: https://codereview.chromium.org/387993006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282714 0039d316-1c4b-4281-b951-d872f2087c98

ui/gfx/BUILD.gn

@@ -94,6 +94,7 @@ component("gfx") {
     "font_render_params_android.cc",
     "font_render_params_linux.cc",
     "font_render_params_win.cc",
+    "font_render_params.cc",
     "font_render_params.h",
     "frame_time.h",
     "gdi_util.cc",