Enable slices of external strings (in the tentative implementation).

src/runtime.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6011 matching lines @@
         }
       } else {
         FindStringIndices(isolate,
                           subject_vector,
                           pattern_content.ToUC16Vector(),
                           &indices,
                           limit);
       }
     } else {
       Vector<const uc16> subject_vector = subject_content.ToUC16Vector();
-      if (pattern->IsAsciiRepresentation()) {
+      if (pattern_content.IsAscii()) {
         FindStringIndices(isolate,
                           subject_vector,
                           pattern_content.ToAsciiVector(),
                           &indices,
                           limit);
       } else {
         FindStringIndices(isolate,
                           subject_vector,
                           pattern_content.ToUC16Vector(),
                           &indices,
@@ skipping 6950 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal