Extract hardcoded error strings into a single place and replace them with enum.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 39ff656ec45be81f7fa5c9c633b4dbe92c227981..7dd2a86c9b3999a84522094eeb45c286bf29bbcd 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -2938,7 +2938,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
     __ j(equal, &miss);
   } else if (FLAG_debug_code) {
     __ CompareRoot(rbx, Heap::kTheHoleValueRootIndex);
-    __ Check(not_equal, "DontDelete cells can't contain the hole");
+    __ Check(not_equal, kDontDeleteCellsCanTContainTheHole);
   }
 
   HandlerFrontendFooter(name, &success, &miss);