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 53082f99cfdd6f0c3e562593b718d7b49fc8d2c2..1b8cbea47c25e672fb77c960800c3e26627388a2 100644
--- a/third_party/WebKit/Source/core/loader/resource/ImageResource.h
+++ b/third_party/WebKit/Source/core/loader/resource/ImageResource.h
@@ -160,6 +160,9 @@ class CORE_EXPORT ImageResource final
     // Do not show or reload placeholder.
     DoNotReloadPlaceholder,
 
+    // Show placeholder, and do not reload.

[sclittle, 2017/04/06 21:58:06]

nit: could you clarify in the comment here that the original image will still be
loaded and shown if the image is explicitly reloaded, e.g. when
reloadIfLoFiOrPlaceholderImage is called with kReloadAlways?

+    ShowAndDoNotReloadPlaceholder,
+
     // Do not show placeholder, reload only when decode error occurs.
     ReloadPlaceholderOnDecodeError,