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 43b74ad9de7e4e536e4622aaa21d24705af5a9e0..8a5df31b797013c2f2c7a177303e82b053c84921 100644
--- a/src/client/linux/minidump_writer/linux_dumper.cc
+++ b/src/client/linux/minidump_writer/linux_dumper.cc
@@ -119,9 +119,11 @@ bool
 LinuxDumper::ElfFileIdentifierForMapping(const MappingInfo& mapping,
                                          bool member,
                                          unsigned int mapping_id,
-                                         uint8_t identifier[sizeof(MDGUID)]) {
+                                         uint8_t identifier[kMaxBuildID],
+                                         size_t* identifier_length) {
   assert(!member || mapping_id < mappings_.size());
-  my_memset(identifier, 0, sizeof(MDGUID));
+  assert(identifier_length);
+  my_memset(identifier, 0, kMaxBuildID);
   if (IsMappedFileOpenUnsafe(mapping))
     return false;
 
@@ -136,7 +138,9 @@ 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,
+                                                   identifier_length);
   }
 
   char filename[NAME_MAX];
@@ -154,7 +158,9 @@ LinuxDumper::ElfFileIdentifierForMapping(const MappingInfo& mapping,
     return false;
 
   bool success =
-      FileID::ElfFileIdentifierFromMappedFile(mapped_file.data(), identifier);
+      FileID::ElfFileIdentifierFromMappedFile(mapped_file.data(),
+                                              identifier,
+                                              identifier_length);
   if (success && member && filename_modified) {
     mappings_[mapping_id]->name[filename_len -
                                 sizeof(kDeletedSuffix) + 1] = '\0';