[net] Better StopCaching() handling for HttpCache::Transaction.

net/http/partial_data.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 NET_HTTP_PARTIAL_DATA_H_
 #define NET_HTTP_PARTIAL_DATA_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
@@ skipping 102 matching lines @@
   // the internal state about the current range.
   void OnCacheReadCompleted(int result);
 
   // This method should be called after receiving data from the network, to
   // update the internal state about the current range.
   void OnNetworkReadCompleted(int result);
 
   bool initial_validation() const { return initial_validation_; }
 
  private:
+  // Returned by GetNextRangeLen() to indicate that the next range extends to
+  // EOF.
+  static const int64 kUnbounded;

[rvargas (doing something else), 2015/07/27 22:25:12]

does this has to be part of the header? (as opposed to a constant on the anon
namespace)

[asanka, 2015/08/18 22:46:59]

Moved to anon namespace.

+
   // Returns the length to use when scanning the cache.
-  int GetNextRangeLen();
+  int64 GetNextRangeLen();
 
   // Completion routine for our callback.
   void GetAvailableRangeCompleted(int64* start, int result);
 
   int64 current_range_start_;
   int64 current_range_end_;
   int64 cached_start_;
   int64 resource_size_;
-  int cached_min_len_;
+  int64 cached_min_len_;
   HttpByteRange byte_range_;  // The range requested by the user.
   // The clean set of extra headers (no ranges).
   HttpRequestHeaders extra_headers_;
   bool range_present_;  // True if next range entry is already stored.
   bool final_range_;
   bool sparse_entry_;
   bool truncated_;  // We have an incomplete 200 stored.
   bool initial_validation_;  // Only used for truncated entries.
   CompletionCallback callback_;
   base::WeakPtrFactory<PartialData> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PartialData);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_PARTIAL_DATA_H_