Replace std::map with base::SmallMap in ui::LatencyInfo

content/common/content_param_traits.h

Index: content/common/content_param_traits.h
diff --git a/content/common/content_param_traits.h b/content/common/content_param_traits.h
index d4bc359863e4102b62bfb9174aa79e82f8c36038..4bc13cc96218c6fe98ccc4d17594ff3ea4335d40 100644
--- a/content/common/content_param_traits.h
+++ b/content/common/content_param_traits.h
@@ -68,6 +68,41 @@ struct ParamTraits<WebInputEventPointer> {
   static void Log(const param_type& p, std::string* l);
 };
 
+template <typename NormalMap,
+          int kArraySize,
+          typename EqualKey,
+          typename MapInit>
+struct ParamTraits<base::SmallMap<NormalMap, kArraySize, EqualKey, MapInit> > {
+  typedef base::SmallMap<NormalMap, kArraySize, EqualKey, MapInit> param_type;

[jdduke (slow), 2014/02/13 20:48:43]

Hmm, this should probably live in common_param_traits, (or perhaps even in
base/)... I'll move and add a unit test.

+  typedef typename param_type::key_type K;
+  typedef typename param_type::data_type V;
+  static void Write(Message* m, const param_type& p) {
+    WriteParam(m, static_cast<int>(p.size()));
+    typename param_type::const_iterator iter;
+    for (iter = p.begin(); iter != p.end(); ++iter) {
+      WriteParam(m, iter->first);
+      WriteParam(m, iter->second);
+    }
+  }
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r) {
+    int size;
+    if (!ReadParam(m, iter, &size) || size < 0)
+      return false;
+    for (int i = 0; i < size; ++i) {
+      K k;
+      if (!ReadParam(m, iter, &k))
+        return false;
+      V& value = (*r)[k];
+      if (!ReadParam(m, iter, &value))
+        return false;
+    }
+    return true;
+  }
+  static void Log(const param_type& p, std::string* l) {
+    l->append("<base::SmallMap>");
+  }
+};
+
 }  // namespace IPC
 
 #endif  // CONTENT_COMMON_CONTENT_PARAM_TRAITS_H_