Add UMA to count the usage of sendBeacon with non-simple Content-Type

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 837230d02d7bf9212391ac3085a78d11ddfd15c5..caa6cab49d58333f052de5793e35df478d8b256f 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -252,6 +252,10 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   WebRuntimeFeatures::enableRenderingPipelineThrottling(
     base::FeatureList::IsEnabled(features::kRenderingPipelineThrottling));
 
+  WebRuntimeFeatures::enableSendBeaconThrowForBlobWithNonSimpleType(
+    base::FeatureList::IsEnabled(
+      features::kSendBeaconThrowForBlobWithNonSimpleType));
+
 #if defined(OS_ANDROID)
   WebRuntimeFeatures::enablePaymentRequest(
       base::FeatureList::IsEnabled(features::kWebPayments));