Use a FrameAssociatedLoader when downloading image resources.

content/renderer/fetchers/resource_fetcher_impl.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_FETCHERS_RESOURCE_FETCHER_H_
 #define CONTENT_RENDERER_FETCHERS_RESOURCE_FETCHER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
 #include "content/public/renderer/resource_fetcher.h"
 #include "content/renderer/fetchers/web_url_loader_client_impl.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
+#include "third_party/WebKit/public/web/WebURLLoaderOptions.h"
 
 class GURL;
 
 namespace blink {
 class WebFrame;
 class WebURLLoader;
 struct WebURLError;
+struct WebURLLoaderOptions;
 }
 
 namespace content {
 
 class ResourceFetcherImpl : public ResourceFetcher,
                             public WebURLLoaderClientImpl {
  public:
   // ResourceFetcher implementation:
   void SetMethod(const std::string& method) override;
   void SetBody(const std::string& body) override;
   void SetHeader(const std::string& header, const std::string& value) override;
+  void SetLoaderOptions(const blink::WebURLLoaderOptions& options) override;
   void Start(blink::WebFrame* frame,
              blink::WebURLRequest::RequestContext request_context,
              blink::WebURLRequest::FrameType frame_type,
              LoaderType loader_type,
              const Callback& callback) override;
   void SetTimeout(const base::TimeDelta& timeout) override;
 
  private:
   friend class ResourceFetcher;
 
   explicit ResourceFetcherImpl(const GURL& url);
 
   virtual ~ResourceFetcherImpl();
 
   // Callback for timer that limits how long we wait for the server.  If this
   // timer fires and the request hasn't completed, we kill the request.
   void TimeoutFired();
 
   // WebURLLoaderClientImpl methods:
   void OnLoadComplete() override;
   void Cancel() override;
 
   scoped_ptr<blink::WebURLLoader> loader_;
 
+  // Options to send to the loader.
+  blink::WebURLLoaderOptions options_;
+
   // Request to send.  Released once Start() is called.
   blink::WebURLRequest request_;
 
   // Callback when we're done.
   Callback callback_;
 
   // Limit how long to wait for the server.
   base::OneShotTimer<ResourceFetcherImpl> timeout_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceFetcherImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_FETCHERS_RESOURCE_FETCHER_H_