Make assertion scopes thread safe.

src/interpreter-irregexp.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 600 matching lines @@
 
 
 RegExpImpl::IrregexpResult IrregexpInterpreter::Match(
     Isolate* isolate,
     Handle<ByteArray> code_array,
     Handle<String> subject,
     int* registers,
     int start_position) {
   ASSERT(subject->IsFlat());
 
-  AssertNoAllocation a;
+  DisallowHeapAllocation no_gc;
   const byte* code_base = code_array->GetDataStartAddress();
   uc16 previous_char = '\n';
   String::FlatContent subject_content = subject->GetFlatContent();
   if (subject_content.IsAscii()) {
     Vector<const uint8_t> subject_vector = subject_content.ToOneByteVector();
     if (start_position != 0) previous_char = subject_vector[start_position - 1];
     return RawMatch(isolate,
                     code_base,
                     subject_vector,
                     registers,
                     start_position,
                     previous_char);
   } else {
     ASSERT(subject_content.IsTwoByte());
     Vector<const uc16> subject_vector = subject_content.ToUC16Vector();
     if (start_position != 0) previous_char = subject_vector[start_position - 1];
     return RawMatch(isolate,
                     code_base,
                     subject_vector,
                     registers,
                     start_position,
                     previous_char);
   }
 }
 
 } }  // namespace v8::internal