Remove a bunch of Isolate::Current() callsites from simulators

src/x64/simulator-x64.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_X64_SIMULATOR_X64_H_
 #define V8_X64_SIMULATOR_X64_H_
 
 #include "src/allocation.h"
 
 namespace v8 {
 namespace internal {
 
 // Since there is no simulator for the x64 architecture the only thing we can
 // do is to call the entry directly.
 // TODO(X64): Don't pass p0, since it isn't used?
-#define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
+#define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \
   (entry(p0, p1, p2, p3, p4))
 
 typedef int (*regexp_matcher)(String*, int, const byte*,
                               const byte*, int*, int, Address, int, Isolate*);
 
 // Call the generated regexp code directly. The code at the entry address should
 // expect eight int/pointer sized arguments and return an int.
-#define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6, p7, p8) \
+#define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \
+                                   p7, p8)                                     \
   (FUNCTION_CAST<regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, p8))
 
 // The stack limit beyond which we will throw stack overflow errors in
 // generated code. Because generated code on x64 uses the C stack, we
 // just use the C stack limit.
 class SimulatorStack : public v8::internal::AllStatic {
  public:
   static inline uintptr_t JsLimitFromCLimit(Isolate* isolate,
                                             uintptr_t c_limit) {
     return c_limit;
   }
 
-  static inline uintptr_t RegisterCTryCatch(uintptr_t try_catch_address) {
+  static inline uintptr_t RegisterCTryCatch(Isolate* isolate,
+                                            uintptr_t try_catch_address) {
+    USE(isolate);
     return try_catch_address;
   }
 
-  static inline void UnregisterCTryCatch() { }
+  static inline void UnregisterCTryCatch(Isolate* isolate) { USE(isolate); }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_SIMULATOR_X64_H_