Tie multibuffers to URLs

media/blink/cache_util.h

 // Copyright 2013 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_CACHE_UTIL_H_
 #define MEDIA_BLINK_CACHE_UTIL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/time/time.h"
 #include "media/blink/media_blink_export.h"
 
 namespace blink {
 class WebURLResponse;
 }
 
 namespace media {
 
 // Reasons that a cached WebURLResponse will *not* prevent a future request to
 // the server.  Reported via UMA, so don't change/reuse previously-existing
 // values.
 enum UncacheableReason {
   kNoData = 1 << 0,  // Not 200 or 206.
   kPre11PartialResponse = 1 << 1,  // 206 but HTTP version < 1.1.
   kNoStrongValidatorOnPartialResponse = 1 << 2,  // 206, no strong validator.
   kShortMaxAge = 1 << 3,  // Max age less than 1h (arbitrary value).
   kExpiresTooSoon = 1 << 4,  // Expires in less than 1h (arbitrary value).
   kHasMustRevalidate = 1 << 5,  // Response asks for revalidation.
   kNoCache = 1 << 6,  // Response included a no-cache header.
   kNoStore = 1 << 7,  // Response included a no-store header.
   kMaxReason  // Needs to be one more than max legitimate reason.
 };
 
 // Return the logical OR of the reasons "response" cannot be used for a future
 // request (using the disk cache), or 0 if it might be useful.
 uint32 MEDIA_BLINK_EXPORT
 GetReasonsForUncacheability(const blink::WebURLResponse& response);
 
+// Returns when we should evict data from this response from our
+// memory cache. Note that we may still cache data longer if
+// a audio/video tag is currently using it.
+base::TimeTicks MEDIA_BLINK_EXPORT
+GetMemoryCacheValidUntil(const blink::WebURLResponse& response);
+
 }  // namespace media
 
 #endif  // MEDIA_BLINK_CACHE_UTIL_H_