Lower priority of async scripts

Source/core/html/parser/HTMLResourcePreloader.cpp

Index: Source/core/html/parser/HTMLResourcePreloader.cpp
diff --git a/Source/core/html/parser/HTMLResourcePreloader.cpp b/Source/core/html/parser/HTMLResourcePreloader.cpp
index 3f1ee72eab01460a69638136a0c6c97b2c5eaa87..25b2d4d8616b8936e42e22768474cb7544b2da88 100644
--- a/Source/core/html/parser/HTMLResourcePreloader.cpp
+++ b/Source/core/html/parser/HTMLResourcePreloader.cpp
@@ -88,6 +88,7 @@ void HTMLResourcePreloader::takeAndPreload(PreloadRequestStream& r)
 void HTMLResourcePreloader::preload(PassOwnPtr<PreloadRequest> preload)
 {
     FetchRequest request = preload->resourceRequest(m_document);
+    request.setExecAsync(preload->execAsync());
     blink::Platform::current()->histogramCustomCounts("WebCore.PreloadDelayMs", static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime())), 0, 2000, 20);
     m_document->fetcher()->preload(preload->resourceType(), request, preload->charset());
 }