Protobuf for Traffic Annotation and first use by a URLFetcher.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 928d1af83dcbf8f870f59b487989fa3cc2708cd9..3652788b703d3c92e95847706463b777dda300a9 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -358,6 +358,7 @@ component("net") {
 
   public_deps = [
     ":net_quic_proto",
+    ":traffic_annotation",
     "//crypto",
     "//crypto:platform",
   ]
@@ -2975,6 +2976,14 @@ source_set("simple_quic_tools") {
   ]
 }
 
+source_set("traffic_annotation") {
+  sources = [
+    "traffic_annotation/network_traffic_annotation.h",
+    "traffic_annotation/network_traffic_annotation_test_helper.h",

[asanka, 2017/02/08 04:37:16]

Can test_helper be moved to :test_support ?

[Ramin Halavati, 2017/02/08 10:09:57]

Done.

+  ]
+  deps = []
+}
+
 if (!is_ios) {
   executable("quic_client") {
     sources = [