Set "ping" requests priority as lowest

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

Index: third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp
diff --git a/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp b/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp
index 57ae8dea3348a3cfbe41ae484093189103aced6d..c95b85df2fa47e52de8050118b200877fabfa0d9 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp
@@ -215,6 +215,13 @@ ResourceLoadPriority ResourceFetcher::ComputeLoadPriority(
     }
   } else if (FetchParameters::kLazyLoad == defer_option) {
     priority = kResourceLoadPriorityVeryLow;
+  } else if (resource_request.GetRequestContext() ==
+                 WebURLRequest::kRequestContextBeacon ||
+             resource_request.GetRequestContext() ==
+                 WebURLRequest::kRequestContextPing ||
+             resource_request.GetRequestContext() ==
+                 WebURLRequest::kRequestContextCSPReport) {
+    priority = kResourceLoadPriorityVeryLow;
   }
 
   // A manually set priority acts as a floor. This is used to ensure that