Initial support for dumping DWARF corresponding to Swift code

src/common/dwarf_cu_to_module.h

 // -*- mode: c++ -*-
 
 // Copyright (c) 2010 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
@@ skipping 184 matching lines @@
     // Line number NUMBER in LINE_FILE, of length LENGTH, includes code
     // covered by no function.
     virtual void UncoveredLine(const Module::Line &line);
 
     // The DW_TAG_subprogram DIE at OFFSET has no name specified directly
     // in the DIE, nor via a DW_AT_specification or DW_AT_abstract_origin
     // link.
     virtual void UnnamedFunction(uint64 offset);
 
     // __cxa_demangle() failed to demangle INPUT.
-    virtual void DemangleError(const string &input, int error);
+    virtual void DemangleError(const string &input);
 
     // The DW_FORM_ref_addr at OFFSET to TARGET was not handled because
     // FilePrivate did not retain the inter-CU specification data.
     virtual void UnhandledInterCUReference(uint64 offset, uint64 target);
 
     uint64 cu_offset() const {
       return cu_offset_;
     }
 
    protected:
@@ skipping 95 matching lines @@
 
   // The line numbers we have seen thus far.  We accumulate these here
   // during parsing.  Then, in Finish, we call AssignLinesToFunctions
   // to dole them out to the appropriate functions.
   vector<Module::Line> lines_;
 };
 
 }  // namespace google_breakpad
 
 #endif  // COMMON_LINUX_DWARF_CU_TO_MODULE_H__