Initialize ICU before running any of the //net fuzzers.

net/base/fuzzer_test_support.cc

+// Copyright 2016 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.
+
+#include "base/at_exit.h"
+#include "base/i18n/icu_util.h"
+
+namespace {
+
+// This translation unit provides a static initializer to set up ICU.
+//
+// ICU is used internally by GURL, which is used throughout the //net code.
+// Initializing ICU is important to prevent fuzztests from asserting when
+// handling non-ASCII urls.
+//
+// Note that in general static initializers are not allowed, however this is
+// just being used by test code.
+struct InitICU {
+  InitICU() { CHECK(base::i18n::InitializeICU()); }
+  base::AtExitManager at_exit_manager;
+};
+
+InitICU* init_icu = new InitICU();
+
+}  // namespace