Expose changes in the network quality to the renderers

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index f6de3ee93b3e8a8a4229e8b3066424795d7e5e9b..1e4c4328e4312fc97732f95e8c18a1449bad2021 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -61,6 +61,7 @@
 #include "components/version_info/version_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/cookie_store_factory.h"
+#include "content/public/browser/network_quality_observer_factory.h"
 #include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/user_agent.h"
@@ -90,7 +91,6 @@
 #include "net/http/http_server_properties_impl.h"
 #include "net/net_features.h"
 #include "net/nqe/external_estimate_provider.h"
-#include "net/nqe/network_quality_estimator.h"
 #include "net/nqe/network_quality_estimator_params.h"
 #include "net/proxy/proxy_config_service.h"
 #include "net/proxy/proxy_script_fetcher_impl.h"
@@ -583,6 +583,8 @@ void IOThread::Init() {
   globals_->network_quality_estimator.reset(new net::NetworkQualityEstimator(
       std::move(external_estimate_provider), network_quality_estimator_params,
       net_log_));
+  globals_->network_quality_observer = content::CreateNetworkQualityObserver(
+      globals_->network_quality_estimator.get());
 
   UpdateDnsClientEnabled();
 #if defined(OS_CHROMEOS)