Implement nextHopProtocol in PerformanceResourceTiming and PerformanceNavigationTiming.

third_party/WebKit/Source/platform/loader/fetch/ResourceResponse.cpp

Index: third_party/WebKit/Source/platform/loader/fetch/ResourceResponse.cpp
diff --git a/third_party/WebKit/Source/platform/loader/fetch/ResourceResponse.cpp b/third_party/WebKit/Source/platform/loader/fetch/ResourceResponse.cpp
index ff94534708aa30acb2cff7c44414da04d991bea6..1deef87650236643f0931af34966b9ae691074cb 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/ResourceResponse.cpp
+++ b/third_party/WebKit/Source/platform/loader/fetch/ResourceResponse.cpp
@@ -101,6 +101,8 @@ ResourceResponse::ResourceResponse()
       last_modified_(0.0),
       app_cache_id_(0),
       response_time_(0),
+      connection_info_(
+          net::HttpResponseInfo::ConnectionInfo::CONNECTION_INFO_UNKNOWN),
       encoded_data_length_(0),
       encoded_body_length_(0),
       decoded_body_length_(0) {}
@@ -572,6 +574,13 @@ KURL ResourceResponse::OriginalURLViaServiceWorker() const {
   return url_list_via_service_worker_.back();
 }
 
+String ResourceResponse::ConnectionInfoString() const {
+  std::string connection_info_string =
+      net::HttpResponseInfo::ConnectionInfoToString(connection_info_);
+  return String::FromUTF8(connection_info_string.c_str(),

[haraken, 2017/06/23 03:58:04]

Can we use AtomicString(connection_info_string.data(),
connection_info_string.length())?

[shaseley, 2017/06/23 16:39:22]

I see, to avoid the conversion from String to AtomicString at the call site?

It appears that AtomicString doesn't have a constructor for (char*, unsigned),
but we can cast to LChar*. I've pushed a new patch set with this change.

+                          connection_info_string.size());
+}
+
 void ResourceResponse::SetEncodedDataLength(long long value) {
   encoded_data_length_ = value;
 }