Add a warning whenever link preloads are not used

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LinkPreloadResourceClients_h
 #define LinkPreloadResourceClients_h
 
 #include "core/fetch/CSSStyleSheetResource.h"
 #include "core/fetch/FontResource.h"
 #include "core/fetch/ImageResource.h"
@@ skipping 51 matching lines @@
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         LinkPreloadResourceClient::trace(visitor);
         ResourceOwner<ScriptResource, ScriptResourceClient>::trace(visitor);
     }
 
 private:
     LinkPreloadScriptResourceClient(LinkLoader* loader, ScriptResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
 class LinkPreloadStyleResourceClient: public LinkPreloadResourceClient, public ResourceOwner<CSSStyleSheetResource, StyleSheetResourceClient> {
     USING_GARBAGE_COLLECTED_MIXIN(LinkPreloadStyleResourceClient);
 public:
     static LinkPreloadStyleResourceClient* create(LinkLoader* loader, CSSStyleSheetResource* resource)
     {
         return new LinkPreloadStyleResourceClient(loader, resource);
     }
@@ skipping 12 matching lines @@
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         LinkPreloadResourceClient::trace(visitor);
         ResourceOwner<CSSStyleSheetResource, StyleSheetResourceClient>::trace(visitor);
     }
 
 private:
     LinkPreloadStyleResourceClient(LinkLoader* loader, CSSStyleSheetResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
 class LinkPreloadImageResourceClient: public LinkPreloadResourceClient, public ResourceOwner<ImageResource> {
     USING_GARBAGE_COLLECTED_MIXIN(LinkPreloadImageResourceClient);
 public:
     static LinkPreloadImageResourceClient* create(LinkLoader* loader, ImageResource* resource)
     {
         return new LinkPreloadImageResourceClient(loader, resource);
     }
@@ skipping 12 matching lines @@
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         LinkPreloadResourceClient::trace(visitor);
         ResourceOwner<ImageResource>::trace(visitor);
     }
 
 private:
     LinkPreloadImageResourceClient(LinkLoader* loader, ImageResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
 class LinkPreloadFontResourceClient: public LinkPreloadResourceClient, public ResourceOwner<FontResource, FontResourceClient> {
     USING_GARBAGE_COLLECTED_MIXIN(LinkPreloadFontResourceClient);
 public:
     static LinkPreloadFontResourceClient* create(LinkLoader* loader, FontResource* resource)
     {
         return new LinkPreloadFontResourceClient(loader, resource);
     }
@@ skipping 12 matching lines @@
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         LinkPreloadResourceClient::trace(visitor);
         ResourceOwner<FontResource, FontResourceClient>::trace(visitor);
     }
 
 private:
     LinkPreloadFontResourceClient(LinkLoader* loader, FontResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
 class LinkPreloadRawResourceClient: public LinkPreloadResourceClient, public ResourceOwner<RawResource, RawResourceClient> {
     USING_GARBAGE_COLLECTED_MIXIN(LinkPreloadRawResourceClient);
 public:
     static LinkPreloadRawResourceClient* create(LinkLoader* loader, RawResource* resource)
     {
         return new LinkPreloadRawResourceClient(loader, resource);
     }
@@ skipping 12 matching lines @@
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         LinkPreloadResourceClient::trace(visitor);
         ResourceOwner<RawResource, RawResourceClient>::trace(visitor);
     }
 
 private:
     LinkPreloadRawResourceClient(LinkLoader* loader, RawResource* resource)
         : LinkPreloadResourceClient(loader)
     {
-        setResource(resource);
+        setResource(resource, Resource::DontMarkAsReferenced);
     }
 };
 
 } // namespace blink
 
 #endif // LinkPreloadResourceClients_h