Roll src/third_party/skia 62fd6c4..d2ca312 (9 commits) (flutter#8307)

https://skia.googlesource.com/skia.git/%2Blog/62fd6c411622..d2ca31218bc4

git log 62fd6c4..d2ca312 --date=short --no-merges --format=%ad %ae %s
2019-03-26 [email protected] Convert GrPorterDuff test from NullGL to Mock context
2019-03-26 [email protected] Run GrTextureMipMapInvalidationTest on rendering contexts
2019-03-26 [email protected] Convert some unit tests from NullGL to Mock context
2019-03-26 [email protected] Detect and fail when invalid SKPs are created by RecreateSKPs bot
2019-03-26 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-26 [email protected] Fix RecreateSKPs bot page sets
2019-03-26 [email protected] move gpu_tool_utils to public_deps
2019-03-26 [email protected] Remove unused setAlphaAndRequiredFrame condition
2019-03-26 [email protected] Roll third_party/externals/swiftshader 54ec759..213a8ce (2 commits)

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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': '62fd6c4116226f5bb9c4d06c85fb9e549b7b3d5b',
+  'skia_revision': 'd2ca31218bc4d06fd3337fb1951ea1800a915f56',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: e3c353b752055b863f6edc51fba4dbed
+Signature: 11cd0788531075042d9be33f624cf021
 
 UNUSED LICENSES: