Let breakpad build with -Wall on OS X and Linux.

src/common/linux/dump_symbols.cc

 // Copyright (c) 2011 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 871 matching lines @@
   return true;
 }
 
 template<typename ElfClass>
 bool ReadSymbolDataElfClass(const typename ElfClass::Ehdr* elf_header,
                             const string& obj_filename,
                             const std::vector<string>& debug_dirs,
                             const DumpOptions& options,
                             Module** out_module) {
   typedef typename ElfClass::Ehdr Ehdr;
-  typedef typename ElfClass::Shdr Shdr;
 
   *out_module = NULL;
 
   unsigned char identifier[16];
   if (!google_breakpad::FileID::ElfFileIdentifierFromMappedFile(elf_header,
                                                                 identifier)) {
     fprintf(stderr, "%s: unable to generate file identifier\n",
             obj_filename.c_str());
     return false;
   }
@@ skipping 95 matching lines @@
   MmapWrapper map_wrapper;
   void* elf_header = NULL;
   if (!LoadELF(obj_file, &map_wrapper, &elf_header))
     return false;
 
   return ReadSymbolDataInternal(reinterpret_cast<uint8_t*>(elf_header),
                                 obj_file, debug_dirs, options, module);
 }
 
 }  // namespace google_breakpad