X87: Remove the dependency of Zone on Isolate

src/x87/regexp-macro-assembler-x87.cc

Index: src/x87/regexp-macro-assembler-x87.cc
diff --git a/src/x87/regexp-macro-assembler-x87.cc b/src/x87/regexp-macro-assembler-x87.cc
index 9bd08caa2ac4567be4e9aa5dc02f0a3862d677f0..cc3f34e4207f8ca53f03f76ba72317450b5513e8 100644
--- a/src/x87/regexp-macro-assembler-x87.cc
+++ b/src/x87/regexp-macro-assembler-x87.cc
@@ -77,12 +77,11 @@ namespace internal {
 
 #define __ ACCESS_MASM(masm_)
 
-RegExpMacroAssemblerX87::RegExpMacroAssemblerX87(
-    Mode mode,
-    int registers_to_save,
-    Zone* zone)
-    : NativeRegExpMacroAssembler(zone),
-      masm_(new MacroAssembler(zone->isolate(), NULL, kRegExpCodeSize)),
+RegExpMacroAssemblerX87::RegExpMacroAssemblerX87(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),