Add a warning whenever link preloads are not used

third_party/WebKit/Source/core/loader/LinkPreloadResourceClients.h

Index: third_party/WebKit/Source/core/loader/LinkPreloadResourceClients.h
diff --git a/third_party/WebKit/Source/core/loader/LinkPreloadResourceClients.h b/third_party/WebKit/Source/core/loader/LinkPreloadResourceClients.h
index 5d916e585dc7b7d88200f3b4ab08249d77af258f..ee6428b8797fae7479d3b94ff5e861c065f16b83 100644
--- a/third_party/WebKit/Source/core/loader/LinkPreloadResourceClients.h
+++ b/third_party/WebKit/Source/core/loader/LinkPreloadResourceClients.h
@@ -70,7 +70,7 @@ private:
     LinkPreloadScriptResourceClient(LinkLoader* loader, ScriptResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
@@ -103,7 +103,7 @@ private:
     LinkPreloadStyleResourceClient(LinkLoader* loader, CSSStyleSheetResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
@@ -136,7 +136,7 @@ private:
     LinkPreloadImageResourceClient(LinkLoader* loader, ImageResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
@@ -169,7 +169,7 @@ private:
     LinkPreloadFontResourceClient(LinkLoader* loader, FontResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
@@ -202,7 +202,7 @@ private:
     LinkPreloadRawResourceClient(LinkLoader* loader, RawResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };