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

src/x87/simulator-x87.h

Index: src/x87/simulator-x87.h
diff --git a/src/x87/simulator-x87.h b/src/x87/simulator-x87.h
index 3071842f20bbbec1f80deee4fa00afde4ca881dc..667f0fd6d7cf67e21e935991725bccffc66a91e0 100644
--- a/src/x87/simulator-x87.h
+++ b/src/x87/simulator-x87.h
@@ -12,7 +12,7 @@ namespace internal {
 
 // Since there is no simulator for the ia32 architecture the only thing we can
 // do is to call the entry directly.
-#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))
 
 
@@ -21,7 +21,8 @@ typedef int (*regexp_matcher)(String*, int, const byte*,
 
 // 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))
 
 
@@ -36,11 +37,13 @@ class SimulatorStack : public v8::internal::AllStatic {
     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