thread isolate for logging calls

src/platform-cygwin.cc

Index: src/platform-cygwin.cc
diff --git a/src/platform-cygwin.cc b/src/platform-cygwin.cc
index bad1ccb72b22de427b61165fe601578fdcd363aa..081f1954d2b9c4359376aa2c1da19a5c6b3f7d90 100644
--- a/src/platform-cygwin.cc
+++ b/src/platform-cygwin.cc
@@ -126,7 +126,7 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 }
 
 
-void OS::LogSharedLibraryAddresses() {
+void OS::LogSharedLibraryAddresses(Isolate* isolate) {
   // This function assumes that the layout of the file is as follows:
   // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name]
   // If we encounter an unexpected situation we abort scanning further entries.
@@ -137,7 +137,6 @@ void OS::LogSharedLibraryAddresses() {
   const int kLibNameLen = FILENAME_MAX + 1;
   char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen));
 
-  i::Isolate* isolate = Isolate::Current();
   // This loop will terminate once the scanning hits an EOF.
   while (true) {
     uintptr_t start, end;