Fix Issue 1320: LiveEdit: text differencer fails with out of memory on large files

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 11554 matching lines @@
 
 // Compares 2 strings line-by-line, then token-wise and returns diff in form
 // of JSArray of triplets (pos1, pos1_end, pos2_end) describing list
 // of diff chunks.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditCompareStrings) {
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_CHECKED(String, s1, 0);
   CONVERT_ARG_CHECKED(String, s2, 1);
 
-  return *LiveEdit::CompareStrings(s1, s2);
+  return LiveEdit::CompareStrings(s1, s2);
 }
 
 
 // A testing entry. Returns statement position which is the closest to
 // source_position.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFunctionCodePositionFromSource) {
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_CHECKED(JSFunction, function, 0);
   CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
@@ skipping 739 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