Avoid heap allocations in IPAddress

content/public/common/common_param_traits.cc

Index: content/public/common/common_param_traits.cc
diff --git a/content/public/common/common_param_traits.cc b/content/public/common/common_param_traits.cc
index 286e6621cc6212cf727ba636c44d4df4a0ba6ceb..b7a6d488c601901456c967dc36c9885eeca39a42 100644
--- a/content/public/common/common_param_traits.cc
+++ b/content/public/common/common_param_traits.cc
@@ -124,11 +124,19 @@ void ParamTraits<net::IPEndPoint>::Log(const param_type& p, std::string* l) {
 
 void ParamTraits<net::IPAddress>::GetSize(base::PickleSizer* s,
                                           const param_type& p) {
-  GetParamSize(s, p.bytes());
+  // TODO(rch): avoid creating a vector here.
+  base::StackVector<uint8_t, 16> bytes;

[eroman, 2017/05/18 18:43:17]

Better thanks!

+  for (uint8_t byte : p.bytes())
+    bytes->push_back(byte);
+  GetParamSize(s, bytes);
 }
 
 void ParamTraits<net::IPAddress>::Write(base::Pickle* m, const param_type& p) {
-  WriteParam(m, p.bytes());
+  // TODO(rch): avoid creating a vector here.
+  base::StackVector<uint8_t, 16> bytes;
+  for (uint8_t byte : p.bytes())
+    bytes->push_back(byte);
+  WriteParam(m, bytes);
 }
 
 bool ParamTraits<net::IPAddress>::Read(const base::Pickle* m,