Add MinidumpRVAListWriter and test

minidump/test/minidump_writable_test_util.cc

Index: minidump/test/minidump_writable_test_util.cc
diff --git a/minidump/test/minidump_writable_test_util.cc b/minidump/test/minidump_writable_test_util.cc
index a964ad27013a9a3dcbfa33e2c0ebdc9c1cda1a36..4ebd7f08cce7a94abcc81e7251e16f743622d9c5 100644
--- a/minidump/test/minidump_writable_test_util.cc
+++ b/minidump/test/minidump_writable_test_util.cc
@@ -19,6 +19,7 @@
 #include "base/basictypes.h"
 #include "base/strings/string16.h"
 #include "gtest/gtest.h"
+#include "util/file/file_writer.h"
 
 namespace crashpad {
 namespace test {
@@ -306,5 +307,21 @@ MinidumpWritableAtLocationDescriptor<MinidumpModuleCodeViewRecordPDB70>(
       file_contents, location);
 }
 
+TestUInt32MinidumpWritable::TestUInt32MinidumpWritable(uint32_t value)
+    : MinidumpWritable(),
+      value_(value) {
+}
+
+TestUInt32MinidumpWritable::~TestUInt32MinidumpWritable() {
+}
+
+size_t TestUInt32MinidumpWritable::SizeOfObject() {
+  return sizeof(value_);
+}
+
+bool TestUInt32MinidumpWritable::WriteObject(FileWriterInterface* file_writer) {
+  return file_writer->Write(&value_, sizeof(value_));
+}
+
 }  // namespace test
 }  // namespace crashpad