Show image placeholders on dimension decode error

third_party/WebKit/Source/core/loader/resource/ImageResource.h

Index: third_party/WebKit/Source/core/loader/resource/ImageResource.h
diff --git a/third_party/WebKit/Source/core/loader/resource/ImageResource.h b/third_party/WebKit/Source/core/loader/resource/ImageResource.h
index fbc4bf16ee4917f4794ecd6fe8d88e4349b4624a..bc687fc524e305b97ac93b1255b43abc37c9a414 100644
--- a/third_party/WebKit/Source/core/loader/resource/ImageResource.h
+++ b/third_party/WebKit/Source/core/loader/resource/ImageResource.h
@@ -163,6 +163,11 @@ class CORE_EXPORT ImageResource final
     // Do not show or reload placeholder.
     kDoNotReloadPlaceholder,
 
+    // Show placeholder, and do not reload. The original image will still be
+    // loaded and shown if the image is explicitly reloaded, e.g. when
+    // ReloadIfLoFiOrPlaceholderImage is called with kReloadAlways.
+    kShowAndDoNotReloadPlaceholder,
+
     // Do not show placeholder, reload only when decode error occurs.
     kReloadPlaceholderOnDecodeError,