Use a FrameAssociatedLoader when downloading image resources.

content/public/renderer/resource_fetcher.h

Index: content/public/renderer/resource_fetcher.h
diff --git a/content/public/renderer/resource_fetcher.h b/content/public/renderer/resource_fetcher.h
index 5c010f999653a390f4c9d689c71a648afe8c6e37..d0e9062d342c6aaf8d12618ff9764d36f4848e56 100644
--- a/content/public/renderer/resource_fetcher.h
+++ b/content/public/renderer/resource_fetcher.h
@@ -20,6 +20,7 @@ class TimeDelta;
 namespace blink {
 class WebFrame;
 class WebURLResponse;
+struct WebURLLoaderOptions;
 }
 
 namespace content {
@@ -52,6 +53,11 @@ class CONTENT_EXPORT ResourceFetcher {
   virtual void SetBody(const std::string& body) = 0;
   virtual void SetHeader(const std::string& header,
                          const std::string& value) = 0;
+  virtual void SetSkipServiceWorker(bool skip_service_worker) = 0;
+
+  // Associate the corresponding WebURLLoaderOptions to the loader. Must be
+  // called before Start. Used if the LoaderType is FRAME_ASSOCIATED_LOADER.
+  virtual void SetLoaderOptions(const blink::WebURLLoaderOptions& options) = 0;
 
   // Starts the request using the specified frame.  Calls |callback| when
   // done.