Update comments in Request constructor to explain referrer handling more clearly

third_party/WebKit/Source/modules/fetch/RequestInit.cpp

Index: third_party/WebKit/Source/modules/fetch/RequestInit.cpp
diff --git a/third_party/WebKit/Source/modules/fetch/RequestInit.cpp b/third_party/WebKit/Source/modules/fetch/RequestInit.cpp
index 703199c39fd9bfe496cdfae63b9173bf5ce355dd..a356d2643f4e1e86015b053a4f1434318855805b 100644
--- a/third_party/WebKit/Source/modules/fetch/RequestInit.cpp
+++ b/third_party/WebKit/Source/modules/fetch/RequestInit.cpp
@@ -54,10 +54,9 @@ RequestInit::RequestInit(ExecutionContext* context, const Dictionary& options, E
     areAnyMembersSet |= isBodySet;
 
     if (areAnyMembersSet) {
-        // If any of init's members are present, unset request's
-        // omit-Origin-header flag, set request's referrer to "client",
-        // and request's referrer policy to the empty string.
-        //
+        // A part of the Request constructor algorithm is performed here. See
+        // the comments in the Request constructor code for the detail.
+
         // We need to use "about:client" instead of |clientReferrerString|,
         // because "about:client" => |clientReferrerString| conversion is done
         // in Request::createRequestWithRequestOrString.