Handlifying clients of StringTable, step 1.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index ab3e8ec3572136061e342288c9c1ba58ddaf8159..dcda502e92979c5b4de8f2e3271205c590b076f8 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -4730,10 +4730,10 @@ static MaybeObject* SearchRegExpMultiple(
       fixed_array->set(fixed_array->length() - 1,
                        Smi::FromInt(builder.length()));
       // Cache the result and turn the FixedArray into a COW array.
-      RegExpResultsCache::Enter(isolate->heap(),
-                                *subject,
-                                regexp->data(),
-                                *fixed_array,
+      RegExpResultsCache::Enter(isolate,
+                                subject,
+                                handle(regexp->data(), isolate),
+                                fixed_array,
                                 RegExpResultsCache::REGEXP_MULTIPLE_INDICES);
     }
     return *builder.ToJSArray(result_array);
@@ -6742,10 +6742,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringSplit) {
 
   if (limit == 0xffffffffu) {
     if (result->HasFastObjectElements()) {
-      RegExpResultsCache::Enter(isolate->heap(),
-                                *subject,
-                                *pattern,
-                                *elements,
+      RegExpResultsCache::Enter(isolate,
+                                subject,
+                                pattern,
+                                elements,
                                 RegExpResultsCache::STRING_SPLIT_SUBSTRINGS);
     }
   }