Fix compile error on arm.

NOTRY=true
TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1773573002

Cr-Commit-Position: refs/heads/master@{#34529}

src/regexp/regexp-ast.h

@@ -79,7 +79,8 @@ class CharacterRange {
   // For compatibility with the CHECK_OK macro
   CharacterRange(void* null) { DCHECK_NULL(null); }  // NOLINT
   CharacterRange(uc32 from, uc32 to) : from_(from), to_(to) {
-    DCHECK(from <= to);
+    DCHECK(0 <= from && to <= String::kMaxCodePoint);
+    DCHECK(static_cast<uint32_t>(from) <= static_cast<uint32_t>(to));
   }
   static void AddClassEscape(uc16 type, ZoneList<CharacterRange>* ranges,
                              Zone* zone);
@@ -88,8 +89,6 @@ class CharacterRange {
     return CharacterRange(value, value);
   }
   static inline CharacterRange Range(uc32 from, uc32 to) {
-    DCHECK(0 <= from && to <= String::kMaxCodePoint);
-    DCHECK(static_cast<uint32_t>(from) <= static_cast<uint32_t>(to));
     return CharacterRange(from, to);
   }
   static inline CharacterRange Everything() {