Remove the dependency of Zone on Isolate

src/regexp-macro-assembler-tracer.h

Index: src/regexp-macro-assembler-tracer.h
diff --git a/src/regexp-macro-assembler-tracer.h b/src/regexp-macro-assembler-tracer.h
index ac76cfdb0674189906a59882c4183371ef5ae4fb..67b1710e45782b4408c4f61a8eadfac84b6f2c43 100644
--- a/src/regexp-macro-assembler-tracer.h
+++ b/src/regexp-macro-assembler-tracer.h
@@ -11,7 +11,7 @@ namespace internal {
 // Decorator on a RegExpMacroAssembler that write all calls.
 class RegExpMacroAssemblerTracer: public RegExpMacroAssembler {
  public:
-  explicit RegExpMacroAssemblerTracer(RegExpMacroAssembler* assembler);
+  RegExpMacroAssemblerTracer(Isolate* isolate, RegExpMacroAssembler* assembler);
   virtual ~RegExpMacroAssemblerTracer();
   virtual int stack_limit_slack() { return assembler_->stack_limit_slack(); }
   virtual bool CanReadUnaligned() { return assembler_->CanReadUnaligned(); }