snapshot: Add a minimal ModuleSnapshotMinidump and accessor from ProcessSnapshotMinidump

snapshot/minidump/minidump_simple_string_dictionary_reader.h

Index: snapshot/minidump/minidump_simple_string_dictionary_reader.h
diff --git a/snapshot/minidump/minidump_simple_string_dictionary_reader.h b/snapshot/minidump/minidump_simple_string_dictionary_reader.h
index 65b7cba8dcadf158ac971f68ea934a5931016222..633ea0f13181578afd6bcc99b0829f502ed24348 100644
--- a/snapshot/minidump/minidump_simple_string_dictionary_reader.h
+++ b/snapshot/minidump/minidump_simple_string_dictionary_reader.h
@@ -30,9 +30,7 @@ namespace internal {
 //!     location in \a file_reader, and returns it in \a dictionary.
 //!
 //! \return `true` on success, with \a dictionary set by replacing its contents.
-//!     `false` on failure, with a message logged. If any individual strings
-//!     cannot be read, or if any duplicate keys are found, it is not considered
-//!     an error, although a message will be logged.
+//!     `false` on failure, with a message logged.
 bool ReadMinidumpSimpleStringDictionary(
     FileReaderInterface* file_reader,
     const MINIDUMP_LOCATION_DESCRIPTOR& location,