win: Save contents of TEBs allowing !teb and !gle to work in windbg

snapshot/test/test_thread_snapshot.cc

Index: snapshot/test/test_thread_snapshot.cc
diff --git a/snapshot/test/test_thread_snapshot.cc b/snapshot/test/test_thread_snapshot.cc
index 8ee26dff0786fe4c49967b7dc6a78f2dc4eb9a0d..621ff424aeb79294e7256eaa671492b1be2a3452 100644
--- a/snapshot/test/test_thread_snapshot.cc
+++ b/snapshot/test/test_thread_snapshot.cc
@@ -55,5 +55,12 @@ uint64_t TestThreadSnapshot::ThreadSpecificDataAddress() const {
   return thread_specific_data_address_;
 }
 
+std::vector<const MemorySnapshot*> TestThreadSnapshot::ExtraMemory() const {
+  std::vector<const MemorySnapshot*> extra_memory;
+  for (const auto& em : extra_memory_)
+    extra_memory.push_back(em);
+  return extra_memory;
+}
+
 }  // namespace test
 }  // namespace crashpad