Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/spdy_buffer.cc

 // Copyright (c) 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.
 
 #include "net/spdy/spdy_buffer.h"
 
 #include <cstring>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/trace_event/memory_usage_estimator.h"
 #include "net/base/io_buffer.h"
 #include "net/spdy/spdy_protocol.h"
 
 namespace net {
 
 namespace {
 
 // Bound on largest frame any SPDY version has allowed.
 const size_t kMaxSpdyFrameSize = 0x00ffffff;
 
@@ skipping 67 matching lines @@
 }
 
 void SpdyBuffer::Consume(size_t consume_size) {
   ConsumeHelper(consume_size, CONSUME);
 };
 
 IOBuffer* SpdyBuffer::GetIOBufferForRemainingData() {
   return new SharedFrameIOBuffer(shared_frame_, offset_);
 }
 
+size_t SpdyBuffer::EstimateMemoryUsage() const {
+  // TODO(xunjieli): Estimate |consume_callbacks_|. https://crbug.com/669108.
+  return base::trace_event::EstimateMemoryUsage(shared_frame_->data);
+}
+
 void SpdyBuffer::ConsumeHelper(size_t consume_size,
                                ConsumeSource consume_source) {
   DCHECK_GE(consume_size, 1u);
   DCHECK_LE(consume_size, GetRemainingSize());
   offset_ += consume_size;
   for (std::vector<ConsumeCallback>::const_iterator it =
            consume_callbacks_.begin(); it != consume_callbacks_.end(); ++it) {
     it->Run(consume_size, consume_source);
   }
 };
 
 }  // namespace net