The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3d9da09031192d50f8adde98897536ab85e135e3

commit 3d9da09031192d50f8adde98897536ab85e135e3
Author: alph <alph@chromium.org>
Date: Fri Feb 24 19:30:29 2017

DevTools: Show decoded body length for network requests on timeline.

BUG= 695234 

Review-Url: https://codereview.chromium.org/2712833002
Cr-Commit-Position: refs/heads/master@{#452902}

[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/LayoutTests/inspector/tracing/timeline-network/timeline-network-resource-details-expected.txt
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/LayoutTests/inspector/tracing/timeline-network/timeline-network-resource-expected.txt
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/core/inspector/InspectorTraceEvents.cpp
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/core/inspector/InspectorTraceEvents.h
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/core/loader/FrameFetchContext.h
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/core/loader/PingLoader.cpp
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/devtools/front_end/timeline/TimelineUIUtils.js
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/platform/loader/fetch/FetchContext.cpp
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/platform/loader/fetch/FetchContext.h
[modify] https://crrev.com/3d9da09031192d50f8adde98897536ab85e135e3/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.cpp

What is this useful for, Alexei?