Use RelocInfo::IsNone in a few more places.

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 8fb9c39ce386db1b1b19d7c12feae89443760074..ca785e9ea6dbb7bc5bf0fa679c7dba7dad0a9382 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -337,12 +337,12 @@ class Immediate BASE_EMBEDDED {
     return Immediate(label);
   }
 
-  bool is_zero() const { return x_ == 0 && rmode_ == RelocInfo::NONE32; }
+  bool is_zero() const { return x_ == 0 && RelocInfo::IsNone(rmode_); }
   bool is_int8() const {
-    return -128 <= x_ && x_ < 128 && rmode_ == RelocInfo::NONE32;
+    return -128 <= x_ && x_ < 128 && RelocInfo::IsNone(rmode_);
   }
   bool is_int16() const {
-    return -32768 <= x_ && x_ < 32768 && rmode_ == RelocInfo::NONE32;
+    return -32768 <= x_ && x_ < 32768 && RelocInfo::IsNone(rmode_);
   }
 
  private: