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

src/client/linux/minidump_writer/linux_dumper.cc

Index: src/client/linux/minidump_writer/linux_dumper.cc
diff --git a/src/client/linux/minidump_writer/linux_dumper.cc b/src/client/linux/minidump_writer/linux_dumper.cc
index 060e6c7c0ad5041dd5be011ceb961d887ffc0875..31590c4d8cede01a81ae615b1a6c18d110956533 100644
--- a/src/client/linux/minidump_writer/linux_dumper.cc
+++ b/src/client/linux/minidump_writer/linux_dumper.cc
@@ -121,9 +121,8 @@ bool
 LinuxDumper::ElfFileIdentifierForMapping(const MappingInfo& mapping,
                                          bool member,
                                          unsigned int mapping_id,
-                                         uint8_t identifier[sizeof(MDGUID)]) {
+                                         wasteful_vector<uint8_t>& identifier) {
   assert(!member || mapping_id < mappings_.size());
-  my_memset(identifier, 0, sizeof(MDGUID));
   if (IsMappedFileOpenUnsafe(mapping))
     return false;
 
@@ -138,7 +137,8 @@ LinuxDumper::ElfFileIdentifierForMapping(const MappingInfo& mapping,
                       reinterpret_cast<const void*>(mapping.start_addr),
                       mapping.size);
     }
-    return FileID::ElfFileIdentifierFromMappedFile(linux_gate, identifier);
+    return FileID::ElfFileIdentifierFromMappedFile(linux_gate,
+                                                   identifier);
   }
 
   char filename[PATH_MAX];
@@ -151,7 +151,8 @@ LinuxDumper::ElfFileIdentifierForMapping(const MappingInfo& mapping,
     return false;
 
   bool success =
-      FileID::ElfFileIdentifierFromMappedFile(mapped_file.data(), identifier);
+      FileID::ElfFileIdentifierFromMappedFile(mapped_file.data(),
+                                              identifier);
   if (success && member && filename_modified) {
     mappings_[mapping_id]->name[my_strlen(mapping.name) -
                                 sizeof(kDeletedSuffix) + 1] = '\0';