Revert of Switch to HarfBuzz on Mac and remove CoreText shaper

Source/platform/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/platform/platform.gni")
 import("//third_party/WebKit/Source/platform/platform_generated.gni")
 
@@ skipping 195 matching lines @@
   deps = [
     ":make_platform_generated",
     "//third_party/harfbuzz-ng",
     "//third_party/icu",
     "//third_party/WebKit/Source/wtf",
     "//third_party/WebKit/Source/platform/heap",
   ]
 
   if (is_mac) {
     sources -= [
+      "fonts/harfbuzz/FontHarfBuzz.cpp",
+      "fonts/harfbuzz/HarfBuzzFaceSkia.cpp",
       "fonts/opentype/OpenTypeTypes.h",
       "fonts/opentype/OpenTypeVerticalData.cpp",
       "fonts/opentype/OpenTypeVerticalData.h",
       # The Mac currently uses FontCustomPlatformDataMac.cpp instead.
       "fonts/skia/FontCustomPlatformDataSkia.cpp",
       "fonts/skia/FontCacheSkia.cpp",
+      "fonts/skia/SimpleFontDataSkia.cpp",
       # Uses LocaleMac instead.
       "text/LocaleICU.cpp",
       "text/LocaleICU.h",
       # Uses KillRingMac.mm instead.
       "KillRingNone.cpp",
       # Mac uses only ScrollAnimatorMac.
       "scroll/ScrollbarThemeNonMacCommon.cpp",
       "scroll/ScrollbarThemeNonMacCommon.h",
       "scroll/ScrollAnimatorNone.cpp",
       "scroll/ScrollAnimatorNone.h",
     ]
 
     # Some Mac-specific parts of WebKit won't compile without having this
     # prefix header injected.
     cflags = [
       "-include",
       rebase_path("../build/mac/Prefix.h", root_build_dir),
     ]
 
     defines += [ "WebFontCache=ChromiumWebCoreObjCWebFontCache" ]
     configs += [ ":mac_objc_renaming" ]
     libs = [
       "Accelerate.framework",
       "Carbon.framework",
       "Foundation.framework",
     ]
   } else {
     sources -= [
+      "fonts/harfbuzz/HarfBuzzFaceCoreText.cpp",
       "geometry/cg/FloatPointCG.cpp",
       "geometry/cg/FloatRectCG.cpp",
       "geometry/cg/FloatSizeCG.cpp",
       "geometry/cg/IntPointCG.cpp",
       "geometry/cg/IntRectCG.cpp",
       "geometry/cg/IntSizeCG.cpp",
     ]
   }
 
   if (is_win) {
@@ skipping 131 matching lines @@
     #'cflags': ['-marm'],
     #    'conditions': [
     #      ['OS=="android"', {
     #        'cflags!': ['-mthumb'],
     #      }],
     #    ],
 
     deps = [ ":blink_common" ]
   }
 }