Add some interfaces to the GC that allow us to reserve space. This is needed...

src/arm/fast-codegen-arm.cc

 // Copyright 2009 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
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 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
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@@ skipping 1604 matching lines @@
       break;
 
     case Expression::kValueTest:
       true_label_ = &push_true;
       break;
 
     case Expression::kTestValue:
       false_label_ = &push_false;
       break;
   }
+
   // Convert current context to test context: End pre-test code.
-
   switch (expr->op()) {
     case Token::IN: {
       __ InvokeBuiltin(Builtins::IN, CALL_JS);
       __ LoadRoot(ip, Heap::kTrueValueRootIndex);
       __ cmp(r0, ip);
       __ b(eq, true_label_);
       __ jmp(false_label_);
       break;
     }
 
@@ skipping 156 matching lines @@
   __ pop(result_register());
   ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize);
   __ mov(r1, Operand(r1, ASR, 1));  // Un-smi-tag value.
   __ add(pc, r1, Operand(masm_->CodeObject()));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal