Switch the Linux minidump writer to use MDCVInfoELF for CV data.

src/client/linux/minidump_writer/minidump_writer_unittest.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 392 matching lines @@
   Minidump minidump(templ);
   ASSERT_TRUE(minidump.Read());
 
   // Check that the main module filename is correct.
   MinidumpModuleList* module_list = minidump.GetModuleList();
   ASSERT_TRUE(module_list);
   const MinidumpModule* module = module_list->GetMainModule();
   EXPECT_STREQ(binpath.c_str(), module->code_file().c_str());
   // Check that the file ID is correct.
   FileID fileid(helper_path.c_str());
-  uint8_t identifier[sizeof(MDGUID)];
-  EXPECT_TRUE(fileid.ElfFileIdentifier(identifier));
+  uint8_t identifier[kMaxBuildID];
+  size_t identifier_length;
+  EXPECT_TRUE(fileid.ElfFileIdentifier(identifier, &identifier_length));
   char identifier_string[kGUIDStringSize];
   FileID::ConvertIdentifierToString(identifier,
                                     identifier_string,
                                     kGUIDStringSize);
   string module_identifier(identifier_string);
   // Strip out dashes
   size_t pos;
   while ((pos = module_identifier.find('-')) != string::npos) {
     module_identifier.erase(pos, 1);
   }
@@ skipping 322 matching lines @@
         kLimitBaseThreadCount) * kMinPerExtraThreadStackReduction;
     EXPECT_LT(total_limit_stack_size,
               total_normal_stack_size - min_expected_reduction);
   }
 
   // Kill the helper program.
   kill(child_pid, SIGKILL);
 }
 
 }  // namespace