Avoid sending mixed-content requests for ImageSet contexts

third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h

Index: third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h b/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
index dafdd00eadfa1bea751d824e6f8f12054869a9a6..4944daa34f198a8533d060bc1d70bfbb248ce776 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
@@ -130,10 +130,13 @@ class PLATFORM_EXPORT ResourceFetcher
 
   String GetCacheIdentifier() const;
 
+  enum IsImageSet { kImageNotImageSet, kImageIsImageSet };
+
   WARN_UNUSED_RESULT static WebURLRequest::RequestContext
-  DetermineRequestContext(Resource::Type, bool is_main_frame);
+  DetermineRequestContext(Resource::Type, IsImageSet, bool is_main_frame);
   WARN_UNUSED_RESULT WebURLRequest::RequestContext DetermineRequestContext(
-      Resource::Type) const;
+      Resource::Type,
+      IsImageSet) const;
 
   void UpdateAllImageResourcePriorities();