Remove SK_IGNORE_GASP_VERSION_CHECK.

The associated Skia roll is now in Chromium so this change can now be
enabled and rebaselined. The related Skia change is
https://skia.googlesource.com/skia.git/+/42a2a20b9114c904ce73d66d0105b81f19d93914

Change plus baselines, original CL and Skia change by Ben Wagner.

TBR'ing since change itself has been reviewed and baseline changes
have been discussed in:
https://skia-review.googlesource.com/c/13863#message-ceea26f848500376b2730668359ea3679778dbe3

BUG=chromium:713942
TBR=bungeman

Review-Url: https://codereview.chromium.org/2835393002
Cr-Commit-Position: refs/heads/master@{#466918}

skia/BUILD.gn

@@ -110,7 +110,7 @@ config("skia_library_config") {
     include_dirs += [ "//third_party/skia/include/utils/ios" ]
   }
 
-  defines = [ "SK_IGNORE_GASP_VERSION_CHECK" ]
+  defines = []
 
   if (is_component_build) {
     defines += [ "SKIA_IMPLEMENTATION=1" ]