Update the ICU's default timezone in render

base/i18n/icu_util.cc

 // Copyright (c) 2012 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/i18n/icu_util.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "third_party/icu/source/common/unicode/putil.h"
 #include "third_party/icu/source/common/unicode/udata.h"
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+#include "third_party/icu/source/i18n/unicode/timezone.h"
+#endif
 
 #if defined(OS_MACOSX)
 #include "base/mac/foundation_util.h"
 #endif
 
 #define ICU_UTIL_DATA_FILE   0
 #define ICU_UTIL_DATA_SHARED 1
 #define ICU_UTIL_DATA_STATIC 2
 
 namespace base {
@@ skipping 52 matching lines @@
 #endif
 
 
 #if !defined(OS_NACL)
 bool InitializeICU() {
 #if !defined(NDEBUG)
   DCHECK(!g_check_called_once || !g_called_once);
   g_called_once = true;
 #endif
 
+  bool result;
 #if (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_SHARED)
   // We expect to find the ICU data module alongside the current module.
   FilePath data_path;
   PathService::Get(base::DIR_MODULE, &data_path);
   data_path = data_path.AppendASCII(ICU_UTIL_DATA_SHARED_MODULE_NAME);
 
   HMODULE module = LoadLibrary(data_path.value().c_str());
   if (!module) {
     LOG(ERROR) << "Failed to load " << ICU_UTIL_DATA_SHARED_MODULE_NAME;
     return false;
   }
 
   FARPROC addr = GetProcAddress(module, ICU_UTIL_DATA_SYMBOL);
   if (!addr) {
     LOG(ERROR) << ICU_UTIL_DATA_SYMBOL << ": not found in "
                << ICU_UTIL_DATA_SHARED_MODULE_NAME;
     return false;
   }
 
   UErrorCode err = U_ZERO_ERROR;
   udata_setCommonData(reinterpret_cast<void*>(addr), &err);
-  return err == U_ZERO_ERROR;
+  result = (err == U_ZERO_ERROR);
 #elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_STATIC)
   // The ICU data is statically linked.
-  return true;
+  result = true;
 #elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE)
   // If the ICU data directory is set, ICU won't actually load the data until
   // it is needed.  This can fail if the process is sandboxed at that time.
   // Instead, we map the file in and hand off the data so the sandbox won't
   // cause any problems.
 
   // Chrome doesn't normally shut down ICU, so the mapped data shouldn't ever
   // be released.
   CR_DEFINE_STATIC_LOCAL(base::MemoryMappedFile, mapped_file, ());
   if (!mapped_file.IsValid()) {
@@ skipping 23 matching lines @@
       return false;
     }
 #endif  // OS check
     if (!mapped_file.Initialize(data_path)) {
       LOG(ERROR) << "Couldn't mmap " << data_path.AsUTF8Unsafe();
       return false;
     }
   }
   UErrorCode err = U_ZERO_ERROR;
   udata_setCommonData(const_cast<uint8*>(mapped_file.data()), &err);
-  return err == U_ZERO_ERROR;
+  result = (err == U_ZERO_ERROR);
 #endif
+
+// To respond to the timezone change properly, the default timezone
+// cache in ICU has to be populated on starting up.
+// TODO(jungshik): Some callers do not care about tz at all. If necessary,
+// add a boolean argument to this function to init'd the default tz only
+// when requested.
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  if (result)
+    scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
+#endif
+  return result;
 }
 #endif
 
 void AllowMultipleInitializeCallsForTesting() {
 #if !defined(NDEBUG)
   g_check_called_once = false;
 #endif
 }
 
 }  // namespace i18n
 }  // namespace base