Fix a race in initialization of timezone cache in platform-win32.

src/platform-solaris.cc

Index: src/platform-solaris.cc
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index 4d910d47ad0abe78c7f80f1bbebf8d376c11665c..f23ae0838b6db00f4abfaf2d91a53085ec74d034 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -80,7 +80,7 @@ namespace v8 {
 namespace internal {
 
 
-const char* OS::LocalTimezone(double time) {
+const char* OS::LocalTimezone(double time, TimezoneCache* cache) {
   if (std::isnan(time)) return "";
   time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
   struct tm* t = localtime(&tv);
@@ -89,7 +89,7 @@ const char* OS::LocalTimezone(double time) {
 }
 
 
-double OS::LocalTimeOffset() {
+double OS::LocalTimeOffset(TimezoneCache* cache) {
   tzset();
   return -static_cast<double>(timezone * msPerSecond);
 }