Removing more TLS fetches

src/api.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3222 matching lines @@
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
   if (func->shared()->script()->IsScript()) {
     i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
     return i::GetScriptLineNumber(script, func->shared()->start_position());
   }
   return kLineOffsetNotFound;
 }
 
 
 int String::Length() const {
-  if (IsDeadCheck(i::Isolate::Current(), "v8::String::Length()")) return 0;
-  return Utils::OpenHandle(this)->length();
+  i::Handle<i::String> str = Utils::OpenHandle(this);
+  if (IsDeadCheck(str->GetIsolate(), "v8::String::Length()")) return 0;
+  return str->length();
 }
 
 
 int String::Utf8Length() const {
-  if (IsDeadCheck(i::Isolate::Current(), "v8::String::Utf8Length()")) return 0;
-  return Utils::OpenHandle(this)->Utf8Length();
+  i::Handle<i::String> str = Utils::OpenHandle(this);
+  if (IsDeadCheck(str->GetIsolate(), "v8::String::Utf8Length()")) return 0;
+  return str->Utf8Length();
 }
 
 
 int String::WriteUtf8(char* buffer,
                       int capacity,
                       int* nchars_ref,
                       WriteHints hints) const {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   if (IsDeadCheck(isolate, "v8::String::WriteUtf8()")) return 0;
   LOG_API(isolate, "String::WriteUtf8");
@@ skipping 2440 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* thread_local =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   thread_local->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal