MIPS64: Remove the dependency of Zone on Isolate.

src/mips64/regexp-macro-assembler-mips64.h

Index: src/mips64/regexp-macro-assembler-mips64.h
diff --git a/src/mips64/regexp-macro-assembler-mips64.h b/src/mips64/regexp-macro-assembler-mips64.h
index dd4e8a93bcaf09c1297ab2fcee431af7b74950dc..ae4d25b79aaf473211cfaf4dd1ad95953ebd82df 100644
--- a/src/mips64/regexp-macro-assembler-mips64.h
+++ b/src/mips64/regexp-macro-assembler-mips64.h
@@ -17,7 +17,8 @@ namespace internal {
 #ifndef V8_INTERPRETED_REGEXP
 class RegExpMacroAssemblerMIPS: public NativeRegExpMacroAssembler {
  public:
-  RegExpMacroAssemblerMIPS(Mode mode, int registers_to_save, Zone* zone);
+  RegExpMacroAssemblerMIPS(Isolate* isolate, Zone* zone, Mode mode,
+                           int registers_to_save);
   virtual ~RegExpMacroAssemblerMIPS();
   virtual int stack_limit_slack();
   virtual void AdvanceCurrentPosition(int by);