Update from https://crrev.com/306655

build/secondary/third_party/icu/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("//third_party/icu/config.gni")
 
 # Meta target that includes both icuuc and icui18n. Most targets want both.
 # You can depend on the individually if you need to.
 group("icu") {
   deps = [
@@ skipping 206 matching lines @@
     "source/i18n/utrans.cpp",
     "source/i18n/vtzone.cpp",
     "source/i18n/vzone.cpp",
     "source/i18n/windtfmt.cpp",
     "source/i18n/winnmfmt.cpp",
     "source/i18n/wintzimpl.cpp",
     "source/i18n/zonemeta.cpp",
     "source/i18n/zrule.cpp",
     "source/i18n/ztrans.cpp",
   ]
-  defines = [
-    "U_I18N_IMPLEMENTATION",
-  ]
+  defines = [ "U_I18N_IMPLEMENTATION" ]
   deps = [
     ":icuuc",
   ]
 
   # ICU uses RTTI, replace the default "no rtti" config.
   configs -= [
     "//build/config/compiler:no_rtti",  # ICU uses RTTI.
     "//build/config/compiler:chromium_code",
   ]
   configs += [
@@ skipping 12 matching lines @@
     ]
   }
   if (is_clang) {
     # uspoof.h has a U_NAMESPACE_USE macro. That's a bug,
     # the header should use U_NAMESPACE_BEGIN instead.
     # http://bugs.icu-project.org/trac/ticket/9054
     configs -= [ "//build/config/clang:extra_warnings" ]
 
     cflags += [
       "-Wno-header-hygiene",
+
       # Looks like a real issue, see http://crbug.com/114660
       "-Wno-return-type-c-linkage",
     ]
   }
 }
 
 component("icuuc") {
   sources = [
     "source/common/appendable.cpp",
     "source/common/bmpset.cpp",
@@ skipping 160 matching lines @@
     "source/common/utrie2_builder.cpp",
     "source/common/utrie2.cpp",
     "source/common/utrie.cpp",
     "source/common/uts46.cpp",
     "source/common/utypes.c",
     "source/common/uvector.cpp",
     "source/common/uvectr32.cpp",
     "source/common/uvectr64.cpp",
     "source/common/wintz.c",
   ]
-  defines = [
-    "U_COMMON_IMPLEMENTATION",
-  ]
+  defines = [ "U_COMMON_IMPLEMENTATION" ]
   deps = [
     ":icudata",
   ]
   configs += [ ":icu_code" ]
 
   configs -= [
     "//build/config/compiler:no_rtti",  # ICU uses RTTI.
     "//build/config/compiler:chromium_code",
   ]
   configs += [
@@ skipping 13 matching lines @@
   if (is_ios) {
     # TODO(GYP): Support mac resource bundle shown below.
     # 'link_settings': {
     #   'mac_bundle_resources': [
     #     'source/data/in/icudtl.dat',
     #   ],
     # }
   } else {
     copy("icudata") {
       if (is_android) {
-        sources = [ "android/icudtl.dat" ]
+        sources = [
+          "android/icudtl.dat",
+        ]
       } else {
-        sources = [ "source/data/in/icudtl.dat" ]
+        sources = [
+          "source/data/in/icudtl.dat",
+        ]
       }
 
       outputs = [ "$root_out_dir/icudtl.dat" ]
     }
   }
 } else {
   if (is_win) {
     # On Windows the target DLL is pre-built so just use a copy rule.
     copy("icudata") {
-      sources = [ "windows/icudt.dll" ]
+      sources = [
+        "windows/icudt.dll",
+      ]
       outputs = [ "$root_out_dir/icudt.dll" ]
     }
   } else {
     source_set("icudata") {
       # These are hand-generated, but will do for now.
       #
       # TODO(GYP): Gyp has considerations here for QNX and for the host toolchain
       #  that have not been ported over.
       if (is_linux) {
-        sources = [ "linux/icudtl_dat.S" ]
+        sources = [
+          "linux/icudtl_dat.S",
+        ]
       } else if (is_mac) {
-        sources = [ "mac/icudtl_dat.S" ]
+        sources = [
+          "mac/icudtl_dat.S",
+        ]
       } else if (is_android) {
-        sources = [ "android/icudtl_dat.S" ]
+        sources = [
+          "android/icudtl_dat.S",
+        ]
       } else {
         assert(false, "No icu data for this platform")
       }
       defines = [ "U_HIDE_DATA_SYMBOL" ]
     }
   }
 }