Use a FrameAssociatedLoader when downloading image resources.

content/renderer/fetchers/multi_resolution_image_resource_fetcher.cc

Index: content/renderer/fetchers/multi_resolution_image_resource_fetcher.cc
diff --git a/content/renderer/fetchers/multi_resolution_image_resource_fetcher.cc b/content/renderer/fetchers/multi_resolution_image_resource_fetcher.cc
index 33868c3b1d9f1727073f5b13f025c6eef83fe4ac..3deb00bfdcd8f1eb0b8c7ae3fced26178be473ee 100644
--- a/content/renderer/fetchers/multi_resolution_image_resource_fetcher.cc
+++ b/content/renderer/fetchers/multi_resolution_image_resource_fetcher.cc
@@ -10,10 +10,12 @@
 #include "content/public/renderer/resource_fetcher.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
+#include "third_party/WebKit/public/web/WebURLLoaderOptions.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/geometry/size.h"
 
 using blink::WebFrame;
+using blink::WebURLLoaderOptions;
 using blink::WebURLRequest;
 using blink::WebURLResponse;
 
@@ -30,11 +32,24 @@ MultiResolutionImageResourceFetcher::MultiResolutionImageResourceFetcher(
       http_status_code_(0),
       image_url_(image_url) {
   fetcher_.reset(ResourceFetcher::Create(image_url));
+
+  WebURLLoaderOptions options;
+  options.allowCredentials = true;
+  options.crossOriginRequestPolicy =
+      WebURLLoaderOptions::CrossOriginRequestPolicyAllow;
+  fetcher_->SetLoaderOptions(options);
+
+  // To prevent cache tainting, the favicon requests have to by-pass the service
+  // workers. This should ideally not happen or at least not all the time.
+  // See https://crbug.com/448427
+  if (request_context == WebURLRequest::RequestContextFavicon)
+    fetcher_->SetSkipServiceWorker(true);
+
   fetcher_->Start(
       frame,
       request_context,
       WebURLRequest::FrameTypeNone,
-      ResourceFetcher::PLATFORM_LOADER,
+      ResourceFetcher::FRAME_ASSOCIATED_LOADER,
       base::Bind(&MultiResolutionImageResourceFetcher::OnURLFetchComplete,
                  base::Unretained(this)));
 }