Merge r77 from upstream tcmalloc to the local chromium branch....

third_party/tcmalloc/chromium/src/symbolize.cc

 // Copyright (c) 2009, Google Inc.
 // 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
@@ skipping 148 matching lines @@
       }
       // We have successfully read the output of pprof into out.  Make sure
       // the last symbol is full (we can tell because it ends with a \n).
       // TODO(glider): even when the last symbol is full, the list of symbols
       // may be incomplete. We should check for that and return the number of
       // symbols we actually get from pprof.
       if (total_bytes_read == 0 || out[total_bytes_read - 1] != '\n')
         return false;
       // make the symbolization_table values point to the output vector
       SymbolMap::iterator fill = symbolization_table->begin();
-      const char *current_name = out;
+      char *current_name = out;
       for (int i = 0; i < total_bytes_read; i++) {
         if (out[i] == '\n') {
           fill->second = current_name;
           out[i] = '\0';
           current_name = out + i + 1;
           fill++;
         }
       }
       return true;
     }
   }
   return false;  // shouldn't be reachable
 #endif
 }