MIPS64: Remove the dependency of Zone on Isolate.

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

Index: src/mips64/regexp-macro-assembler-mips64.cc
diff --git a/src/mips64/regexp-macro-assembler-mips64.cc b/src/mips64/regexp-macro-assembler-mips64.cc
index b20cab98258deeb96cf2bc0fd06ac009f3e7f62c..c1c0e4c2ea88429c765761452b8f1e6d2d992a5b 100644
--- a/src/mips64/regexp-macro-assembler-mips64.cc
+++ b/src/mips64/regexp-macro-assembler-mips64.cc
@@ -131,12 +131,11 @@ namespace internal {
 
 #define __ ACCESS_MASM(masm_)
 
-RegExpMacroAssemblerMIPS::RegExpMacroAssemblerMIPS(
-    Mode mode,
-    int registers_to_save,
-    Zone* zone)
-    : NativeRegExpMacroAssembler(zone),
-      masm_(new MacroAssembler(zone->isolate(), NULL, kRegExpCodeSize)),
+RegExpMacroAssemblerMIPS::RegExpMacroAssemblerMIPS(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),