Roll src/third_party/skia/ 1ccaa6e05..c4e384e5a (28 commits) (flutter/engine#5047)

https://skia.googlesource.com/skia.git/+log/1ccaa6e05629..c4e384e5ad85

$ git log 1ccaa6e05..c4e384e5a --date=short --no-merges --format='%ad %ae %s'
2018-04-19 reed check if we fail to eval the conic in pathmeasure
2018-04-19 bungeman Remove unused parameters from internalGetPath.
2018-04-19 egdaniel When creating testing backendTexture take colorspace into account.
2018-04-19 kjlubick Fix Chromecast bots
2018-04-19 borenet [infra] gen_tasks: Pass internal hardware ID as a property
2018-04-18 herb Untangle strike cache and glyph cache
2018-04-19 mtklein disallow negative setReserve() calls
2018-04-19 mtklein rm SkTDArray::select()
2018-04-19 mtklein clean up setReserve() rule-bending
2018-04-18 scroggo Remove the limit on dng allocations
2018-04-19 scroggo Revert "Add stub gpu workaround generators"
2018-04-19 caryclark path is rect track corners
2018-04-17 borenet Reland "[infra] Run recipes through Kitchen"
2018-04-19 angle-skia-autoroll Roll third_party/externals/angle2/ aaa19de06..eeec3b14c (1 commit)
2018-04-18 angle-skia-autoroll Roll third_party/externals/angle2/ 5804dc8ea..aaa19de06 (9 commits)
2018-04-18 enne Add stub gpu workaround generators
2018-04-18 herb Move strike cache Find*() to strike cache
2018-04-18 liyuqian Remove SK_SUPPORT_LEGACY_PATH_DAA_BIT
2018-04-18 fmalita Prevent unnecessary/unbounded growth of SkTDynamicHash capacity
2018-04-18 bungeman DFT to draw A8 instead of incorrect vertical lcd.
2018-04-18 csmartdalton ccpr: Implement conics
2018-04-18 csmartdalton Always call endFlush on opLists that might survive a flush
2018-04-18 fmalita Convert A8 D32 mask blitters to Sk4px
2018-04-18 liyuqian Reland "Fix the fat rect bug in the threaded backend"
2018-04-18 halcanary SkQP: speed up tools/skqp/make_apk_list\
2018-04-18 brianosman Support all destination profiles in SkColorSpaceXform_skcms
2018-04-17 brianosman With ES3, enable both ES2 and ES3 external image extensions
2018-04-18 caryclark fix path is rect flaw exposed by gold

Created with:
  roll-dep src/third_party/skia

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': '1ccaa6e056296db61eb1af2668a23995fe98e6b3',
+  'skia_revision': 'c4e384e5ad85250920cac6e8ee0e2a14b69d67e0',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the