Tie multibuffers to URLs

media/blink/resource_multibuffer.h

+// Copyright 2015 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 MEDIA_BLINK_RESOURCE_MULTIBUFFER_H_
+#define MEDIA_BLINK_RESOURCE_MULTIBUFFER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "media/blink/media_blink_export.h"
+#include "media/blink/multibuffer.h"
+#include "media/blink/url_index.h"
+#include "third_party/WebKit/public/web/WebFrame.h"
+
+namespace media {
+class MediaLog;
+class ResourceMultiBufferDataProvider;
+
+// A multibuffer for loading media resources which knows
+// how to create MultibufferDataProviders to load data
+// into the cache.
+class MEDIA_BLINK_EXPORT ResourceMultiBuffer
+    : NON_EXPORTED_BASE(public MultiBuffer) {
+ public:
+  explicit ResourceMultiBuffer(blink::WebFrame* frame);
+  ~ResourceMultiBuffer() override;
+
+  // A redirect, fail or new urldata.
+  void OnRedirect(const scoped_refptr<UrlData>& from,
+                  const scoped_refptr<UrlData>& to);
+  void Fail(const scoped_refptr<UrlData>& from);
+  UrlIndex* url_index() { return &url_index_; }
+  blink::WebFrame* frame() const { return frame_; }
+
+ protected:
+  MultiBuffer::DataProvider* CreateWriter(const BlockId& pos) override;
+
+ private:
+  friend class ResourceMultiBufferDataProvider;

[liberato (no reviews please), 2015/11/05 19:03:18]

why is this needed?  didn't see anything other than |frame_|, which has a public
accessor.

[hubbe, 2015/11/13 22:56:52]

Gone.

+  blink::WebFrame* frame_;
+  UrlIndex url_index_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BLINK_RESOURCE_MULTIBUFFER_H_