Remove the dependency of Zone on Isolate

src/arm64/regexp-macro-assembler-arm64.cc

Index: src/arm64/regexp-macro-assembler-arm64.cc
diff --git a/src/arm64/regexp-macro-assembler-arm64.cc b/src/arm64/regexp-macro-assembler-arm64.cc
index e9a485d09036cc5d382245907e397bc45b84efd8..1630f212bf7114bf9700e6852bff28ee959f0a3e 100644
--- a/src/arm64/regexp-macro-assembler-arm64.cc
+++ b/src/arm64/regexp-macro-assembler-arm64.cc
@@ -111,12 +111,11 @@ namespace internal {
 
 #define __ ACCESS_MASM(masm_)
 
-RegExpMacroAssemblerARM64::RegExpMacroAssemblerARM64(
-    Mode mode,
-    int registers_to_save,
-    Zone* zone)
-    : NativeRegExpMacroAssembler(zone),
-      masm_(new MacroAssembler(zone->isolate(), NULL, kRegExpCodeSize)),
+RegExpMacroAssemblerARM64::RegExpMacroAssemblerARM64(Isolate* isolate,
+                                                     Zone* zone, Mode mode,
+                                                     int registers_to_save)
+    : NativeRegExpMacroAssembler(isolate, zone),
+      masm_(new MacroAssembler(isolate, NULL, kRegExpCodeSize)),
       mode_(mode),
       num_registers_(registers_to_save),
       num_saved_registers_(registers_to_save),