android: Don't run failing FontTest.DeriveFont; run gfx_unittests on bots.

ui/gfx/platform_font_android.cc

Index: ui/gfx/platform_font_android.cc
diff --git a/ui/gfx/platform_font_android.cc b/ui/gfx/platform_font_android.cc
index c6cc838bacbcbd836ed35939f78c5d3a6a0eba9a..bcb455f5d54add3538b5e73f5a9e6daea38eba40 100644
--- a/ui/gfx/platform_font_android.cc
+++ b/ui/gfx/platform_font_android.cc
@@ -17,6 +17,8 @@ PlatformFont* PlatformFont::CreateDefault() {
 // static
 PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
                                                   int font_size) {
+  // If you implement this, enable FontTest.DeriveFont on Android,
+  // https://crbug.com/642010
   NOTIMPLEMENTED();
   return NULL;
 }