Some plumbing for the beginning of getting handles into snapshot/minidump

snapshot/test/test_process_snapshot.cc

Index: snapshot/test/test_process_snapshot.cc
diff --git a/snapshot/test/test_process_snapshot.cc b/snapshot/test/test_process_snapshot.cc
index d388c6016a100a80279cde820fb53621b7f49752..c022dc41eb356cb992a1e798c171f200c60d49d0 100644
--- a/snapshot/test/test_process_snapshot.cc
+++ b/snapshot/test/test_process_snapshot.cc
@@ -34,6 +34,7 @@ TestProcessSnapshot::TestProcessSnapshot()
       modules_(),
       exception_(),
       memory_map_(),
+      handles_(),
       extra_memory_() {
 }
 
@@ -107,6 +108,10 @@ std::vector<const MemoryMapRegionSnapshot*> TestProcessSnapshot::MemoryMap()
   return memory_map;
 }
 
+std::vector<HandleSnapshot> TestProcessSnapshot::Handles() const {
+  return handles_;
+}
+
 std::vector<const MemorySnapshot*> TestProcessSnapshot::ExtraMemory() const {
   std::vector<const MemorySnapshot*> extra_memory;
   for (const auto& em : extra_memory_)