mandoline: Fix ICU initialization.

mojo/application/public/cpp/initialize_base_and_icu.cc

+// Copyright 2015 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.
+
+// This file declares a raw symbol and should be included only once in a
+// certain binary target. This needs to be run before we raise the sandbox,
+// which means that it can't use mojo. Our runners will dig around in the
+// symbol table and run this before the mojo system is initialized.
+
+#include "base/files/file.h"
+#include "base/i18n/icu_util.h"
+#include "base/rand_util.h"
+#include "base/sys_info.h"
+#include "mojo/public/c/system/types.h"
+#include "third_party/icu/source/i18n/unicode/timezone.h"
+
+extern "C" {
+#if defined(WIN32)
+__declspec(dllexport) void __cdecl
+#else
+void __attribute__((visibility("default")))
+#endif
+InitializeBase(base::PlatformFile platform_file) {
+  base::RandUint64();
+  base::SysInfo::AmountOfPhysicalMemory();
+  base::SysInfo::NumberOfProcessors();
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+  base::SysInfo::MaxSharedMemorySize();
+#endif
+
+  // Initialize core ICU. We must perform the full initialization before we
+  // initialize icu::TimeZone subsystem because otherwise ICU gets in a state
+  // where the timezone data is disconnected from the locale data which can
+  // cause crashes.
+  base::i18n::InitializeICUWithFileDescriptor(
+      platform_file, base::MemoryMappedFile::Region::kWholeFile);
+
+  // ICU DateFormat class (used in base/time_format.cc) needs to get the
+  // Olson timezone ID by accessing the zoneinfo files on disk. After
+  // TimeZone::createDefault is called once here, the timezone ID is
+  // cached and there's no more need to access the file system.
+  scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
+}
+}