Avoid CTFontCreateCopyWithAttributes.
Avoid CTFontCreateCopyWithAttributes.

It appears that CTFontCreateCopyWithAttributes and
CTFontCreateCopyWithSymbolicTraits share similar issues with the default
font on OSX10.10. CTFontCreateWithFontDescriptor cannot be used as
it will not work with webfonts. Since this is all low-level use, create the
CTFonts from the underlying CGFonts directly.

BUG=chromium:524646

Review URL: https://codereview.chromium.org/1344213004

tmpvar/skia.cc,HalCanary/skia-hc,shahrzadmn/skia,HalCanary/skia-hc,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,HalCanary/skia-hc,qrealka/skia-hc,tmpvar/skia.cc,qrealka/skia-hc,rubenvb/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,tmpvar/skia.cc,aosp-mirror/platform_external_skia,qrealka/skia-hc,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,google/skia,Hikari-no-Tenshi/android_external_skia,tmpvar/skia.cc,tmpvar/skia.cc,tmpvar/skia.cc,aosp-mirror/platform_external_skia,tmpvar/skia.cc,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,qrealka/skia-hc,qrealka/skia-hc,rubenvb/skia,shahrzadmn/skia,google/skia,HalCanary/skia-hc,HalCanary/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,shahrzadmn/skia,google/skia,HalCanary/skia-hc,HalCanary/skia-hc,rubenvb/skia,rubenvb/skia,google/skia,qrealka/skia-hc,shahrzadmn/skia,Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,shahrzadmn/skia,qrealka/skia-hc,shahrzadmn/skia,shahrzadmn/skia,tmpvar/skia.cc,shahrzadmn/skia,google/skia,rubenvb/skia,google/skia,rubenvb/skia,google/skia,HalCanary/skia-hc,google/skia,tmpvar/skia.cc,Hikari-no-Tenshi/android_external_skia,google/skia,rubenvb/skia,shahrzadmn/skia,qrealka/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia