Fix FreeType component build on Fedora

third_party/freetype/BUILD.gn

Index: third_party/freetype/BUILD.gn
diff --git a/third_party/freetype/BUILD.gn b/third_party/freetype/BUILD.gn
index 30c0b3703b9288cdb5a67bad64fb0a6eefb3bfc1..ab0c1b0626edd12200c45d2d51998da08dba3d39 100644
--- a/third_party/freetype/BUILD.gn
+++ b/third_party/freetype/BUILD.gn
@@ -56,10 +56,18 @@ component("freetype") {
   ]
 
   if (is_linux || is_chromecast) {
-    # Needed for content_shell on Linux and Chromecast, since fontconfig requires FT_Get_BDF_Property.
+    # Needed for content_shell on Linux and Chromecast, since fontconfig
+    # requires FT_Get_BDF_Property.
     sources += [ "src/src/base/ftbdf.c" ]
   }
 
+  if (is_linux || is_chromecast) {
+    # Needed on Fedora whose libfreetype builds ftsynth.c containing
+    # FT_GlyphSlot_Embolden, which we need to replace in content_shell if
+    # we are linking against our own FreeType.
+    sources += [ "src/src/base/ftsynth.c" ]
+  }
+
   defines = [
     "FT2_BUILD_LIBRARY",
     "DARWIN_NO_CARBON",