Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/hpack/hpack_encoder.h

 // Copyright 2014 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_SPDY_HPACK_HPACK_ENCODER_H_
 #define NET_SPDY_HPACK_HPACK_ENCODER_H_
 
 #include <stddef.h>
 
 #include <functional>
@@ skipping 83 matching lines @@
   // this encoder.
   void SetHeaderListener(HeaderListener listener) { listener_ = listener; }
 
   void SetHeaderTableDebugVisitor(
       std::unique_ptr<HpackHeaderTable::DebugVisitorInterface> visitor) {
     header_table_.set_debug_visitor(std::move(visitor));
   }
 
   void DisableCompression() { enable_compression_ = false; }
 
+  // Returns the estimate of dynamically allocated memory in bytes.
+  size_t EstimateMemoryUsage() const;
+
  private:
   friend class test::HpackEncoderPeer;
 
   class RepresentationIterator;
   class Encoderator;
 
   // Encodes a sequence of header name-value pairs as a single header block.
   void EncodeRepresentations(RepresentationIterator* iter, std::string* output);
 
   // Emits a static/dynamic indexed representation (Section 7.1).
@@ skipping 32 matching lines @@
   IndexingPolicy should_index_;
   bool enable_compression_;
   bool should_emit_table_size_;
 
   DISALLOW_COPY_AND_ASSIGN(HpackEncoder);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_HPACK_ENCODER_H_