Fix ugly typo in HValue::UpdateRepresentation.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 32eda119ca89cef688a0b80e9f24cd573cf109bb..6de90deb5b3309ff9069abff3f85af5951deaf8f 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -890,10 +890,10 @@ class HValue: public ZoneObject {
   Representation representation() const { return representation_; }
   void ChangeRepresentation(Representation r) {
     ASSERT(CheckFlag(kFlexibleRepresentation));
+    ASSERT(!CheckFlag(kCannotBeTagged) || !r.IsTagged());
     RepresentationChanged(r);
     representation_ = r;
-    if (r.IsTagged() ||
-        (r.IsDouble() && CheckFlag(kCannotBeTagged))) {
+    if (r.IsTagged()) {
       // Tagged is the bottom of the lattice, don't go any further.
       ClearFlag(kFlexibleRepresentation);
     }