Improvements to uses of base::SmallMap

tools/gn/value.h

Index: tools/gn/value.h
diff --git a/tools/gn/value.h b/tools/gn/value.h
index 3ce0117ff6fe9320787eab22a9f03474d4f41be1..3103509bc7065a86b205d191ae9e840a6e5243b2 100644
--- a/tools/gn/value.h
+++ b/tools/gn/value.h
@@ -120,7 +120,7 @@ class Value {
  private:
   // This are a lot of objects associated with every Value that need
   // initialization and tear down every time. It might be more efficient to
-  // create a union of ManualConstructor objects (see SmallMap) and only
+  // create a union of ManualConstructor objects (see small_map) and only
   // use the one we care about.
   Type type_;
   std::string string_value_;