Fix-up some code relating to SRI double-requesting scripts

third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
index 3afe9168a531d44219c1e54d5444991219632c7a..efff3e4086f4357f8431fba26c2cbea20f5583f1 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
@@ -221,6 +221,14 @@ private:
             setDefer(FetchRequest::LazyLoad);
         else if (match(attributeName, deferAttr))
             setDefer(FetchRequest::LazyLoad);
+        // Note that only scripts need to have the integrity metadata set on
+        // preloads. This is because script resources fetches, and only script
+        // resource fetches, need to re-request resources if a cached version
+        // has different metadata (including empty) from the metadata on the
+        // request. See the comment before the call to
+        // mustRefetchDueToIntegrityMismatch() in
+        // Source/core/fetch/ResourceFetcher.cpp for a more complete
+        // explanation.
         else if (match(attributeName, integrityAttr))
             SubresourceIntegrity::parseIntegrityAttribute(attributeValue, m_integrityMetadata);
     }
@@ -382,7 +390,6 @@ private:
     void setDefer(FetchRequest::DeferOption defer)
     {
         m_defer = defer;
-
     }
 
     bool defer() const