remove most uses of Isolate::Current in arch specific files

src/code-stubs.cc

 // Copyright 2012 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 118 matching lines @@
 }
 
 
 Handle<Code> CodeStub::GetCode(Isolate* isolate) {
   Factory* factory = isolate->factory();
   Heap* heap = isolate->heap();
   Code* code;
   if (UseSpecialCache()
       ? FindCodeInSpecialCache(&code, isolate)
       : FindCodeInCache(&code, isolate)) {
-    ASSERT(IsPregenerated() == code->is_pregenerated());
+    ASSERT(IsPregenerated(isolate) == code->is_pregenerated());
     return Handle<Code>(code);
   }
 
   {
     HandleScope scope(isolate);
 
     Handle<Code> new_object = GenerateCode(isolate);
     new_object->set_major_key(MajorKey());
     FinishCode(new_object);
     RecordCodeGeneration(*new_object, isolate);
@@ skipping 645 matching lines @@
   InstallDescriptor(isolate, &stub3);
 }
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(
     Isolate* isolate) {
   InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 } }  // namespace v8::internal