Roll src/third_party/skia/ 2b8a0d184..7257e22e4 (4 commits) (#5340)

Auto-roller completed checks. Merging.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '2b8a0d1844ed236259284fbc2efe08dab0ed539f',
+  'skia_revision': '7257e22e43a56a5f4f772b687034580061cd011f',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

travis/licenses_golden/licenses_third_party

-Signature: 7ea96de11395225b6deb956fa4348447
+Signature: 5781565355cff7f8645e4ffb7b89a696
 
 UNUSED LICENSES:
 
@@ -14146,6 +14146,9 @@ FILE: ../../../third_party/skia/src/core/SkColorSpace.cpp
 FILE: ../../../third_party/skia/src/core/SkColorSpacePriv.h
 FILE: ../../../third_party/skia/src/core/SkColorSpaceXform.cpp
 FILE: ../../../third_party/skia/src/core/SkColorSpaceXformPriv.h
+FILE: ../../../third_party/skia/src/core/SkColorSpaceXform_A2B.cpp
+FILE: ../../../third_party/skia/src/core/SkColorSpaceXform_A2B.h
+FILE: ../../../third_party/skia/src/core/SkColorSpaceXform_Base.h
 FILE: ../../../third_party/skia/src/core/SkColorSpace_A2B.cpp
 FILE: ../../../third_party/skia/src/core/SkColorSpace_A2B.h
 FILE: ../../../third_party/skia/src/core/SkColorSpace_ICC.cpp