Roll src/third_party/skia/ 47ed6f10e..a070ed7fc (21 commits; 1 trivial rolls) (#5106)

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': '47ed6f10ef1d6c29512f95e88a7e51456c4d8f87',
+  'skia_revision': 'a070ed7fccd8bc9c5f314e1a4ac090c497862836',
 
   # 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: 1a691e792539ae2519d4e5329e9f4ce3
+Signature: 271ce959a2f41a2441d97db11af6cbbb
 
 UNUSED LICENSES:
 
@@ -17245,6 +17245,7 @@ FILE: ../../../third_party/skia/src/gpu/GrDriverBugWorkarounds.h
 FILE: ../../../third_party/skia/src/gpu/GrFPArgs.h
 FILE: ../../../third_party/skia/src/gpu/GrProxyProvider.cpp
 FILE: ../../../third_party/skia/src/gpu/GrProxyProvider.h
+FILE: ../../../third_party/skia/src/gpu/GrRenderTargetProxyPriv.h
 FILE: ../../../third_party/skia/src/gpu/GrResourceProviderPriv.h
 FILE: ../../../third_party/skia/src/gpu/GrSurfaceProxyRef.cpp
 FILE: ../../../third_party/skia/src/gpu/GrUninstantiateProxyTracker.cpp