net: Change auto to not deduce raw pointers.

net/spdy/hpack/hpack_static_table_test.cc

Index: net/spdy/hpack/hpack_static_table_test.cc
diff --git a/net/spdy/hpack/hpack_static_table_test.cc b/net/spdy/hpack/hpack_static_table_test.cc
index 8728d82fac5281ba149facb78663f77988fef82c..c075349832775f7fb61a697dd0adc40f597e0648 100644
--- a/net/spdy/hpack/hpack_static_table_test.cc
+++ b/net/spdy/hpack/hpack_static_table_test.cc
@@ -40,7 +40,7 @@ TEST_F(HpackStaticTableTest, Initialize) {
   HpackHeaderTable::NameToEntryMap static_name_index =
       table_.GetStaticNameIndex();
   std::set<base::StringPiece> names;
-  for (auto entry : static_index) {
+  for (auto* entry : static_index) {
     names.insert(entry->name());
   }
   EXPECT_EQ(names.size(), static_name_index.size());