Consider empty url case when loading image

third_party/WebKit/Source/core/loader/ImageLoader.cpp

Index: third_party/WebKit/Source/core/loader/ImageLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/ImageLoader.cpp b/third_party/WebKit/Source/core/loader/ImageLoader.cpp
index d1bf60bbf24ab085b06a6ac0df22fe195118f243..3dd7f62d60ed29bd47a99e3ade64352594a74d79 100644
--- a/third_party/WebKit/Source/core/loader/ImageLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/ImageLoader.cpp
@@ -328,7 +328,7 @@ void ImageLoader::DoUpdateFromElement(BypassMainWorldBehavior bypass_behavior,
 
   AtomicString image_source_url = element_->ImageSourceURL();
   ImageResourceContent* new_image = nullptr;
-  if (!url.IsNull()) {
+  if (!url.IsNull() && !url.IsEmpty()) {
     // Unlike raw <img>, we block mixed content inside of <picture> or
     // <img srcset>.
     ResourceLoaderOptions resource_loader_options =