Fix multi-isolate build:

test/cctest/test-assembler-ia32.cc

 // Copyright 2006-2008 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 327 matching lines @@
   CHECK(11.99 < res && res < 12.001);
 }
 
 
 typedef int (*F7)(double x, double y);
 
 TEST(AssemblerIa329) {
   InitializeVM();
   v8::HandleScope scope;
   v8::internal::byte buffer[256];
-  MacroAssembler assm(buffer, sizeof buffer);
+  MacroAssembler assm(Isolate::Current(), buffer, sizeof buffer);
   enum { kEqual = 0, kGreater = 1, kLess = 2, kNaN = 3, kUndefined = 4 };
   Label equal_l, less_l, greater_l, nan_l;
   __ fld_d(Operand(esp, 3 * kPointerSize));
   __ fld_d(Operand(esp, 1 * kPointerSize));
   __ FCmp();
   __ j(parity_even, &nan_l, taken);
   __ j(equal, &equal_l, taken);
   __ j(below, &less_l, taken);
   __ j(above, &greater_l, taken);
 
@@ skipping 29 matching lines @@
 #endif
 
   F7 f = FUNCTION_CAST<F7>(Code::cast(code)->entry());
   CHECK_EQ(kLess, f(1.1, 2.2));
   CHECK_EQ(kEqual, f(2.2, 2.2));
   CHECK_EQ(kGreater, f(3.3, 2.2));
   CHECK_EQ(kNaN, f(OS::nan_value(), 1.1));
 }
 
 #undef __