Reload image bypassing the cache

Source/web/ContextMenuClientImpl.cpp

Index: Source/web/ContextMenuClientImpl.cpp
diff --git a/Source/web/ContextMenuClientImpl.cpp b/Source/web/ContextMenuClientImpl.cpp
index e7d9688ba2e7411ecc4141a9c6953e01668ff079..09f63760904c17d1f6e8afcc9a72beb7798dc9fe 100644
--- a/Source/web/ContextMenuClientImpl.cpp
+++ b/Source/web/ContextMenuClientImpl.cpp
@@ -46,6 +46,7 @@
 #include "core/frame/Settings.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLFormElement.h"
+#include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLPlugInElement.h"
@@ -230,6 +231,13 @@ void ContextMenuClientImpl::showContextMenu(const ContextMenu* defaultMenu)
         // An image can be null for many reasons, like being blocked, no image
         // data received from server yet.
         data.hasImageContents = r.image() && !r.image()->isNull();
+        if (data.hasImageContents) {
+            // We know that if absoluteImageURL() is not empty, then this
+            // is a image element.
+            HTMLImageElement* imageElement = toHTMLImageElement(r.innerNodeOrImageMapImage());
+            // TODO: Change "via" to "chrome-proxy" once the server starts sending lo-fi responses.
+            data.imageChromeProxyResponseHeader = imageElement->imageLoader().image()->response().httpHeaderField("via").utf8().data();

[Nate Chapin, 2015/05/01 18:46:51]

What is "via"? It seems wrong to be digging down into response headers here.

[megjablon, 2015/05/01 19:15:23]

We need a way of telling the context menu that an image was a lo-fi image. The
server sends (or will send soon) the response header "chrome-proxy: q=low" for
lo-fi images. I'm currently using the Data Saver via header until this becomes
available. This lo-fi specific logic definitely needs to be moved out of here.
Can I just surface all the response headers to the context menu?

+        }
     } else if (!r.absoluteMediaURL().isEmpty()) {
         data.srcURL = r.absoluteMediaURL();