Add AlternateProtocolInfo to HttpStreamFactoryImpl::Job.

Add AlternateProtocolInfo member to HttpStreamFactoryImpl::Job.  Add
AlternateProtocolInfo argument to constructor, remove it from MarkAsAlternate.
This will be necessary in MaybeMarkAlternateProtocolBroken to pass it on to
SetBrokenAlternateProtocol().  See https://crrev.com/665083009 for context.

BUG=392575

Review URL: https://codereview.chromium.org/871753006

Cr-Commit-Position: refs/heads/master@{#314180}

net/http/http_server_properties.h

@@ -86,6 +86,12 @@ NET_EXPORT_PRIVATE AlternateProtocol AlternateProtocolFromNextProto(
     NextProto next_proto);
 
 struct NET_EXPORT AlternateProtocolInfo {
+  AlternateProtocolInfo()
+      : port(0),
+        protocol(UNINITIALIZED_ALTERNATE_PROTOCOL),
+        probability(0),
+        is_broken(false) {}
+
   AlternateProtocolInfo(uint16 port,
                         AlternateProtocol protocol,
                         double probability)

net/http/http_stream_factory_impl_job.cc

@@ -169,6 +169,7 @@ void HttpStreamFactoryImpl::Job::MarkAsAlternate(
     AlternateProtocolInfo alternate) {
   DCHECK(!original_url_.get());
   original_url_.reset(new GURL(original_url));
+  alternate_protocol_ = alternate;
   if (alternate.protocol == QUIC) {
     DCHECK(session_->params().enable_quic);
     using_quic_ = true;
@@ -1454,6 +1455,7 @@ void HttpStreamFactoryImpl::Job::ReportJobSuccededForRequest() {
 void HttpStreamFactoryImpl::Job::MarkOtherJobComplete(const Job& job) {
   DCHECK_EQ(STATUS_RUNNING, other_job_status_);
   other_job_status_ = job.job_status_;
+  other_job_alternate_protocol_ = job.alternate_protocol_;
   MaybeMarkAlternateProtocolBroken();
 }
 

net/http/http_stream_factory_impl_job.h

@@ -275,6 +275,12 @@ class HttpStreamFactoryImpl::Job {
   // and will specify the original URL.
   scoped_ptr<GURL> original_url_;
 
+  // AlternateProtocol for this job if this is an alternate job.
+  AlternateProtocolInfo alternate_protocol_;
+
+  // AlternateProtocol for the other job if this is not an alternate job.
+  AlternateProtocolInfo other_job_alternate_protocol_;
+
   // This is the Job we're dependent on. It will notify us if/when it's OK to
   // proceed.
   Job* blocking_job_;