Improve memory estimate of SpdySessionPool in net/ MemoryDumpProvider.

net/spdy/http2_frame_decoder_adapter.cc

 // Copyright 2016 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/http2_frame_decoder_adapter.h"
 
 // Logging policy: If an error in the input is detected, VLOG(n) is used so that
 // the option exists to debug the situation. Otherwise, this code mostly uses
 // DVLOG so that the logging does not slow down production code when things are
 // working OK.
 
 #include <stddef.h>
 
 #include <cstdint>
 #include <cstring>
 #include <string>
 #include <utility>
 
 #include "base/logging.h"
 #include "base/optional.h"
 #include "base/strings/string_piece.h"
 #include "base/sys_byteorder.h"
+#include "base/trace_event/memory_usage_estimator.h"
 #include "net/http2/decoder/decode_buffer.h"
 #include "net/http2/decoder/decode_status.h"
 #include "net/http2/decoder/http2_frame_decoder.h"
 #include "net/http2/decoder/http2_frame_decoder_listener.h"
 #include "net/http2/http2_constants.h"
 #include "net/http2/http2_structures.h"
 #include "net/spdy/hpack/hpack_decoder_interface.h"
 #include "net/spdy/hpack/hpack_header_table.h"
 #include "net/spdy/spdy_alt_svc_wire_format.h"
 #include "net/spdy/spdy_bug_tracker.h"
@@ skipping 103 matching lines @@
   SpdyState state() const override { return spdy_state_; }
 
   SpdyFramerError spdy_framer_error() const override {
     return spdy_framer_error_;
   }
 
   bool probable_http_response() const override {
     return latched_probable_http_response_;
   }
 
+  size_t EstimateMemoryUsage() const override {
+    // Skip |frame_decoder_|, |frame_header_| and |hpack_first_frame_header_| as
+    // they don't allocate.
+    return base::trace_event::EstimateMemoryUsage(alt_svc_origin_) +
+           base::trace_event::EstimateMemoryUsage(alt_svc_value_);
+  }
   // ===========================================================================
   // Implementations of the methods declared by Http2FrameDecoderListener.
 
   // Called once the common frame header has been decoded for any frame.
   // This function is largely based on SpdyFramer::ValidateFrameHeader
   // and some parts of SpdyFramer::ProcessCommonHeader.
   bool OnFrameHeader(const Http2FrameHeader& header) override {
     DVLOG(1) << "OnFrameHeader: " << header;
     decoded_frame_header_ = true;
     if (!latched_probable_http_response_) {
@@ skipping 799 matching lines @@
 
 }  // namespace
 
 std::unique_ptr<SpdyFramerDecoderAdapter> CreateHttp2FrameDecoderAdapter(
     SpdyFramer* outer_framer) {
   return std::unique_ptr<SpdyFramerDecoderAdapter>(
       new Http2DecoderAdapter(outer_framer));
 }
 
 }  // namespace net