Add ICUError to handle ICU failures

third_party/WebKit/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 1279 matching lines @@
     "text/BidiTextRun.cpp",
     "text/BidiTextRun.h",
     "text/Character.cpp",
     "text/Character.h",
     "text/CharacterEmoji.cpp",
     "text/DateTimeFormat.cpp",
     "text/DateTimeFormat.h",
     "text/DecodeEscapeSequences.h",
     "text/Hyphenation.cpp",
     "text/Hyphenation.h",
+    "text/ICUError.cpp",
+    "text/ICUError.h",
     "text/LineEnding.cpp",
     "text/LineEnding.h",
     "text/LocaleICU.cpp",
     "text/LocaleICU.h",
     "text/LocaleMac.h",
     "text/LocaleMac.mm",
     "text/LocaleToScriptMapping.cpp",
     "text/LocaleToScriptMapping.h",
     "text/LocaleWin.cpp",
     "text/LocaleWin.h",
@@ skipping 753 matching lines @@
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//cc/surfaces:surface_id",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }