Remove SK_IGNORE_EMOJI_SUBPIXEL_FIX and rebaseline.

The related Skia change has rolled into Chromium and the fix in Skia can
now be turned on and rebaselined.

Change-Id: I8a799896bc743932d37ea62ba8e62cc0582fc55a
Reviewed-on: https://chromium-review.googlesource.com/1156627
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Ben Wagner <bungeman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579490}

skia/BUILD.gn

@@ -116,7 +116,7 @@ config("skia_config") {
 
 # Internal-facing config for Skia library code.
 config("skia_library_config") {
-  defines = [ "SK_IGNORE_EMOJI_SUBPIXEL_FIX" ]
+  defines = []
 
   # These include directories are only included for Skia code and are not
   # exported to dependents.