Add MinidumpCrashpadInfoWriter and its test

minidump/minidump_simple_string_dictionary_writer_test.cc

Index: minidump/minidump_simple_string_dictionary_writer_test.cc
diff --git a/minidump/minidump_simple_string_dictionary_writer_test.cc b/minidump/minidump_simple_string_dictionary_writer_test.cc
index 16de38ea55de5378fb6d19c5952869fb23f7e985..a63cfb33ac2fdcdab6895e12109ea9a2be8ec11d 100644
--- a/minidump/minidump_simple_string_dictionary_writer_test.cc
+++ b/minidump/minidump_simple_string_dictionary_writer_test.cc
@@ -18,6 +18,7 @@
 
 #include "gtest/gtest.h"
 #include "minidump/minidump_extensions.h"
+#include "minidump/minidump_string_writer_test_util.h"
 #include "util/file/string_file_writer.h"
 
 namespace crashpad {
@@ -44,38 +45,6 @@ TEST(MinidumpSimpleStringDictionaryWriter, EmptySimpleStringDictionary) {
   EXPECT_EQ(0u, dictionary->count);
 }
 
-std::string MinidumpUTF8StringAtRVA(const StringFileWriter& file_writer,
-                                    RVA rva) {
-  const std::string& contents = file_writer.string();
-  if (rva == 0) {
-    return std::string();
-  }
-
-  if (rva + sizeof(MinidumpUTF8String) > contents.size()) {
-    ADD_FAILURE()
-        << "rva " << rva << " too large for contents " << contents.size();
-    return std::string();
-  }
-
-  const MinidumpUTF8String* minidump_string =
-      reinterpret_cast<const MinidumpUTF8String*>(&contents[rva]);
-
-  // Verify that the file has enough data for the string’s stated length plus
-  // its required NUL terminator.
-  if (rva + sizeof(MinidumpUTF8String) + minidump_string->Length + 1 >
-          contents.size()) {
-    ADD_FAILURE()
-        << "rva " << rva << ", length " << minidump_string->Length
-        << " too large for contents " << contents.size();
-    return std::string();
-  }
-
-  std::string minidump_string_data(
-      reinterpret_cast<const char*>(&minidump_string->Buffer[0]),
-      minidump_string->Length);
-  return minidump_string_data;
-}
-
 TEST(MinidumpSimpleStringDictionaryWriter, EmptyKeyValue) {
   StringFileWriter file_writer;