Fix bug in net::RequestPriority -> HTTP/2 dependency conversion.

chrome/browser/io_thread.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/io_thread.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 165 matching lines @@
 // Field trial for network quality estimator. Seeds RTT and downstream
 // throughput observations with values that correspond to the connection type
 // determined by the operating system.
 const char kNetworkQualityEstimatorFieldTrialName[] = "NetworkQualityEstimator";
 
 // Field trial for NPN.
 const char kNpnTrialName[] = "NPN";
 const char kNpnTrialEnabledGroupNamePrefix[] = "Enable";
 const char kNpnTrialDisabledGroupNamePrefix[] = "Disable";
 
+// Field trial for priority dependencies.
+const char kSpdyDependenciesFieldTrial[] = "SpdyEnableDependencies";
+const char kSpdyDependenciesFieldTrialEnable[] = "Enable";
+const char kSpdyDepencenciesFieldTrialDisable[] = "Disable";
+
 #if defined(OS_MACOSX)
 void ObserveKeychainEvents() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   net::CertDatabase::GetInstance()->SetMessageLoopForKeychainEvents();
 }
 #endif
 
 // Gets file path into ssl_keylog_file from command line argument or
 // environment variable. Command line argument has priority when
 // both specified.
@@ skipping 604 matching lines @@
   // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466432
   // is fixed.
   tracked_objects::ScopedTracker tracking_profile12_5(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "466432 IOThread::InitAsync::QuicConfiguration"));
   ConfigureQuic(command_line);
   if (command_line.HasSwitch(
           switches::kEnableUserAlternateProtocolPorts)) {
     globals_->enable_user_alternate_protocol_ports = true;
   }
+  ConfigurePriorityDependencies();
   globals_->enable_brotli.set(
       base::FeatureList::IsEnabled(features::kBrotliEncoding));
   globals_->enable_token_binding =
       base::FeatureList::IsEnabled(features::kTokenBinding);
   // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466432
   // is fixed.
   tracked_objects::ScopedTracker tracking_profile13(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "466432 IOThread::InitAsync::InitializeNetworkOptions"));
   InitializeNetworkOptions(command_line);
@@ skipping 282 matching lines @@
       &params->parse_alternative_services);
   globals.enable_alternative_service_with_different_host.CopyToIfSet(
       &params->enable_alternative_service_with_different_host);
   globals.alternative_service_probability_threshold.CopyToIfSet(
       &params->alternative_service_probability_threshold);
 
   globals.enable_npn.CopyToIfSet(&params->enable_npn);
 
   globals.enable_brotli.CopyToIfSet(&params->enable_brotli);
 
+  globals.enable_priority_dependencies.CopyToIfSet(
+      &params->enable_priority_dependencies);
+
   globals.enable_quic.CopyToIfSet(&params->enable_quic);
   globals.disable_quic_on_timeout_with_open_streams.CopyToIfSet(
     &params->disable_quic_on_timeout_with_open_streams);
   globals.enable_quic_for_proxies.CopyToIfSet(&params->enable_quic_for_proxies);
   globals.quic_always_require_handshake_confirmation.CopyToIfSet(
       &params->quic_always_require_handshake_confirmation);
   globals.quic_disable_connection_pooling.CopyToIfSet(
       &params->quic_disable_connection_pooling);
   globals.quic_load_server_info_timeout_srtt_multiplier.CopyToIfSet(
       &params->quic_load_server_info_timeout_srtt_multiplier);
@@ skipping 86 matching lines @@
       quick_check_enabled_.GetValue());
 
   globals_->system_request_context.reset(
       ConstructSystemRequestContext(globals_, net_log_));
 }
 
 void IOThread::UpdateDnsClientEnabled() {
   globals()->host_resolver->SetDnsClientEnabled(*dns_client_enabled_);
 }
 
+void IOThread::ConfigurePriorityDependencies() {
+  std::string group =
+      base::FieldTrialList::FindFullName(kSpdyDependenciesFieldTrial);
+  if (group == kSpdyDependenciesFieldTrialEnable) {
+    globals_->enable_priority_dependencies.set(true);
+  } else if (group == kSpdyDepencenciesFieldTrialDisable) {
+    globals_->enable_priority_dependencies.set(false);
+  }
+}
+
 void IOThread::ConfigureQuic(const base::CommandLine& command_line) {
   // Always fetch the field trial group to ensure it is reported correctly.
   // The command line flags will be associated with a group that is reported
   // so long as trial is actually queried.
   std::string group =
       base::FieldTrialList::FindFullName(kQuicFieldTrialName);
   VariationParameters params;
   if (!variations::GetVariationParams(kQuicFieldTrialName, &params)) {
     params.clear();
   }
@@ skipping 555 matching lines @@
       std::move(job_factory);
 
   context->set_job_factory(
       globals->proxy_script_fetcher_url_request_job_factory.get());
 
   // TODO(rtenneti): We should probably use HttpServerPropertiesManager for the
   // system URLRequestContext too. There's no reason this should be tied to a
   // profile.
   return context;
 }