Resubmit issue 2221103002 to fix the iOS build by declaring the flag in

gyp/core.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Include this gypi to include all 'core' files
 # The parent gyp/gypi file must define
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi
@@ skipping 96 matching lines @@
         '<(skia_src_path)/core/SkDraw.cpp',
         '<(skia_src_path)/core/SkDrawable.cpp',
         '<(skia_src_path)/core/SkDrawLooper.cpp',
         '<(skia_src_path)/core/SkDrawProcs.h',
         '<(skia_src_path)/core/SkEdgeBuilder.cpp',
         '<(skia_src_path)/core/SkEdgeBuilder.h',
         '<(skia_src_path)/core/SkEdgeClipper.cpp',
         '<(skia_src_path)/core/SkEdgeClipper.h',
         '<(skia_src_path)/core/SkEmptyShader.h',
         '<(skia_src_path)/core/SkEndian.h',
+        '<(skia_src_path)/core/SkAnalyticEdge.cpp',
+        '<(skia_src_path)/core/SkAAAConstants.h',
         '<(skia_src_path)/core/SkEdge.cpp',
         '<(skia_src_path)/core/SkEdge.h',
         '<(skia_src_path)/core/SkError.cpp',
         '<(skia_src_path)/core/SkErrorInternals.h',
         '<(skia_src_path)/core/SkFDot6.h',
         '<(skia_src_path)/core/SkFilterProc.cpp',
         '<(skia_src_path)/core/SkFilterProc.h',
         '<(skia_src_path)/core/SkFindAndPlaceGlyph.h',
         '<(skia_src_path)/core/SkFlattenable.cpp',
         '<(skia_src_path)/core/SkFlattenableSerialization.cpp',
@@ skipping 139 matching lines @@
         '<(skia_src_path)/core/SkRRect.cpp',
         '<(skia_src_path)/core/SkRTree.h',
         '<(skia_src_path)/core/SkRTree.cpp',
         '<(skia_src_path)/core/SkRWBuffer.cpp',
         '<(skia_src_path)/core/SkScalar.cpp',
         '<(skia_src_path)/core/SkScalerContext.cpp',
         '<(skia_src_path)/core/SkScalerContext.h',
         '<(skia_src_path)/core/SkScan.cpp',
         '<(skia_src_path)/core/SkScan.h',
         '<(skia_src_path)/core/SkScanPriv.h',
+        '<(skia_src_path)/core/SkScan_AAAPath.cpp',
         '<(skia_src_path)/core/SkScan_AntiPath.cpp',
         '<(skia_src_path)/core/SkScan_Antihair.cpp',
         '<(skia_src_path)/core/SkScan_Hairline.cpp',
         '<(skia_src_path)/core/SkScan_Path.cpp',
         '<(skia_src_path)/core/SkSemaphore.cpp',
         '<(skia_src_path)/core/SkShader.cpp',
         '<(skia_src_path)/core/SkSharedMutex.cpp',
         '<(skia_src_path)/core/SkSharedMutex.h',
         '<(skia_src_path)/core/SkSinglyLinkedList.h',
         '<(skia_src_path)/core/SkSmallAllocator.h',
@@ skipping 231 matching lines @@
         '<(skia_src_path)/pathops/SkPathOpsLine.h',
         '<(skia_src_path)/pathops/SkPathOpsPoint.h',
         '<(skia_src_path)/pathops/SkPathOpsQuad.h',
         '<(skia_src_path)/pathops/SkPathOpsRect.h',
         '<(skia_src_path)/pathops/SkPathOpsTSect.h',
         '<(skia_src_path)/pathops/SkPathOpsTypes.h',
         '<(skia_src_path)/pathops/SkPathWriter.h',
         '<(skia_src_path)/pathops/SkReduceOrder.h',
     ],
 }