Remove the dependency of Zone on Isolate

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

Index: src/arm/regexp-macro-assembler-arm.h
diff --git a/src/arm/regexp-macro-assembler-arm.h b/src/arm/regexp-macro-assembler-arm.h
index 7414e54a658dfd6730e7d914e6fe1d73658e48b9..078d0dfa629b8b230082b0086524c9cae556019c 100644
--- a/src/arm/regexp-macro-assembler-arm.h
+++ b/src/arm/regexp-macro-assembler-arm.h
@@ -16,7 +16,8 @@ namespace internal {
 #ifndef V8_INTERPRETED_REGEXP
 class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
  public:
-  RegExpMacroAssemblerARM(Mode mode, int registers_to_save, Zone* zone);
+  RegExpMacroAssemblerARM(Isolate* isolate, Zone* zone, Mode mode,
+                          int registers_to_save);
   virtual ~RegExpMacroAssemblerARM();
   virtual int stack_limit_slack();
   virtual void AdvanceCurrentPosition(int by);