chrome/renderer/prefetch_helper.h

   1 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_RENDERER_PREFETCH_HELPER_H_
   6 #define CHROME_RENDERER_PREFETCH_HELPER_H_
   7
   8 #include <set>
   9
  10 #include "content/public/renderer/render_frame_observer.h"
  11 #include "third_party/WebKit/public/platform/WebURLLoader.h"
  12 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  13 #include "url/gurl.h"
  14
  15 namespace prefetch {
  16
  17 // Helper class initiating prefetches on behalf of a RenderFrame.
  18 class PrefetchHelper : public content::RenderFrameObserver,
  19                        public blink::WebURLLoaderClient {
  20  public:
  21   explicit PrefetchHelper(content::RenderFrame* render_frame);
  22   virtual ~PrefetchHelper();
  23
  24   // blink::WebURLLoaderClient implementation
  25   virtual void didFinishLoading(blink::WebURLLoader* loader,
  26                                 double finishTime,
  27                                 int64_t totalEncodedDataLength) override;
  28   virtual void didFail(blink::WebURLLoader* loader,
  29                        const blink::WebURLError& error) override;
  30
  31  private:
  32   // RenderViewObserver implementation
  33   bool OnMessageReceived(const IPC::Message& message) override;
  34
  35   void OnPrefetch(const GURL& url);
  36
  37   std::set<blink::WebURLLoader*> loader_set_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(PrefetchHelper);
  40 };
  41
  42 }  // namespace prefetch
  43
  44 #endif  // CHROME_RENDERER_PREFETCH_HELPER_H_