Enable building Skia for iOS with bazel.

BUILD.public

 # Description:
 #   Skia graphics library.
 #
 #   Definitions for Google BUILD file.
 
 exports_files(["BUILD.public"])
 
 # Platform-independent SRCS
 SRCS = glob(
     [
@@ skipping 129 matching lines @@
         "src/ports/SkFontMgr_custom_directory_factory.cpp",
         "src/ports/SkFontMgr_custom_embedded_factory.cpp",
         "src/ports/SkFontMgr_empty_factory.cpp",
         "src/ports/SkImageDecoder_WIC.cpp",
         "src/ports/SkImageDecoder_empty.cpp",
         "src/ports/SkImageGenerator_none.cpp",
         "src/ports/SkTLS_none.cpp",
     ],
 )
 
+# Platform-dependent SRCS for google3-default iOS.
+SRCS_IOS = glob(
+    [
+        "src/gpu/gl/iOS/GrGLCreateNativeInterface_iOS.cpp",
+        "src/opts/**/*.cpp",
+        "src/opts/**/*.h",
+        "src/ports/**/*.cpp",
+        "src/ports/**/*.h",
+    ],
+    exclude = [
+        "src/opts/*mips*",
+        "src/opts/*NEON*",
+        "src/opts/*neon*",
+        "src/opts/*SSE2*",
+        "src/opts/*SSSE3*",
+        "src/opts/*ssse3*",
+        "src/opts/*SSE4*",
+        "src/opts/*sse4*",
+        "src/opts/*x86*",
+        "src/opts/SkBitmapProcState_opts_none.cpp",
+        "src/opts/SkBlitMask_opts_none.cpp",
+        "src/opts/SkBlitRow_opts_none.cpp",
+        "src/ports/*android*",
+        "src/ports/*chromium*",
+        "src/ports/*fontconfig*",
+        "src/ports/*FontConfig*",
+        "src/ports/*FreeType*",
+        "src/ports/*mozalloc*",
+        "src/ports/*nacl*",
+        "src/ports/*win*",
+        "src/ports/SkDebug_stdio.cpp",
+        "src/ports/SkFontMgr_custom.cpp",
+        "src/ports/SkFontMgr_custom_directory_factory.cpp",
+        "src/ports/SkFontMgr_custom_embedded_factory.cpp",
+        "src/ports/SkFontMgr_empty_factory.cpp",
+        "src/ports/SkImageDecoder_CG.cpp",
+        "src/ports/SkImageDecoder_WIC.cpp",
+        "src/ports/SkImageDecoder_empty.cpp",
+        "src/ports/SkImageGenerator_none.cpp",
+        "src/ports/SkTLS_none.cpp",
+    ],
+)
+
 PLATFORM_SRCS = select({
     CONDITION_ANDROID: SRCS_ANDROID,
+    CONDITION_IOS: SRCS_IOS,
     "//conditions:default": SRCS_UNIX,
 })
 
 SRCS_SSSE3 = glob(
     [
         "src/opts/*SSSE3*.cpp",
         "src/opts/*ssse3*.cpp",
     ],
 )
 
@@ skipping 26 matching lines @@
     "include/config",
     "include/core",
     "include/effects",
     "include/gpu",
     "include/images",
     "include/pathops",
     "include/pipe",
     "include/ports",
     "include/private",
     "include/utils",
+    "include/utils/mac",
+    "include/utils/win",
     "include/svg",
     "include/xml",
     "src/core",
     "src/gpu",
     "src/image",
     "src/lazy",
     "src/opts",
     "src/pdf",
     "src/sfnt",
     "src/utils",
     "third_party/etc1",
     "third_party/ktx",
 ]
 
+# Dependencies.
 DEPS_UNIX = [
     ":opts_sse4",
     ":opts_ssse3",
 ]
 
 DEPS_ANDROID = []
 
+DEPS_IOS = []
+
 DEPS = select({
-    CONDITION_ANDROID: DEPS_ANDROID + EXTERNAL_DEPS_ANDROID + EXTERNAL_DEPS_ALL,
-    "//conditions:default": DEPS_UNIX + EXTERNAL_DEPS_UNIX + EXTERNAL_DEPS_ALL,
-})
+    CONDITION_ANDROID: DEPS_ANDROID + EXTERNAL_DEPS_ANDROID,
+    CONDITION_IOS: DEPS_IOS + EXTERNAL_DEPS_IOS,
+    "//conditions:default": DEPS_UNIX + EXTERNAL_DEPS_UNIX,
+}) + EXTERNAL_DEPS_ALL
 
 # Platform-independent SRCS for DM.
 DM_SRCS = glob(
     [
         "dm/*.cpp",
         "dm/*.h",
         "gm/*.c",
         "gm/*.cpp",
         "gm/*.h",
         "tests/*.cpp",
@@ skipping 60 matching lines @@
     "tests",
     "tools",
     "tools/flags",
     "tools/timer",
 ]
 
 COPTS_ANDROID = [
     "-mfpu=neon",
 ]
 
+COPTS_IOS = [
+]
+
 COPTS_UNIX = [
     "-Wno-implicit-fallthrough",  # Some intentional fallthrough.
     "-Wno-deprecated-declarations",  # Internal use of deprecated methods. :(
 ]
 
 COPTS = select({
     CONDITION_ANDROID: COPTS_ANDROID,
+    CONDITION_IOS: COPTS_IOS,
     "//conditions:default": COPTS_UNIX,
 })
 
 DEFINES_ANDROID = [
     "SK_BUILD_FOR_ANDROID",
     # TODO(benjaminwagner): Try to get png library updated?
     "SK_PNG_NO_INDEX_SUPPORTED",
 ]
 
+DEFINES_IOS = [
+    "SK_BUILD_FOR_IOS",
+    "SK_IGNORE_ETC1_SUPPORT",
+]
+
 DEFINES_UNIX = [
     "SK_BUILD_FOR_UNIX",
     "SK_SAMPLES_FOR_X",
 ]
 
 DEFINES_ALL = [
     # Chrome DEFINES.
     "SK_USE_FLOATBITS",
     "SK_USE_FREETYPE_EMBOLDEN",
     # Turn on a few Google3-specific build fixes.
     "GOOGLE3",
 ]
 
 DEFINES = select({
     CONDITION_ANDROID: DEFINES_ANDROID,
+    CONDITION_IOS: DEFINES_IOS,
     "//conditions:default": DEFINES_UNIX,
 }) + DEFINES_ALL
 
 LINKOPTS = select({
     CONDITION_ANDROID: [
         "-ldl",
         "-lEGL",
     ],
     "//conditions:default": ["-ldl"],
 })
@@ skipping 41 matching lines @@
         "--images %s/resources" % BASE_DIR,
     ],
     copts = COPTS,
     data = glob(["resources/**/*"]),
     defines = DEFINES,
     includes = DM_INCLUDES,
     deps = DM_EXTERNAL_DEPS + [
         ":skia",
     ] + EXTERNAL_DEPS_ALL,
 )