Tested the issue on reported version 63.0.3239.84, on latest stable 63.0.3239.132  using Ubuntu 14.04 with steps mentioned below.

1. Navigated to https://bugs.chromium.org/p/chromium/issues/detail?id=803226 
2. Opened devtools and typed "font" in styles section and observed font content.

Attaching screenshot for reference.

@Reporter: Could you please check the screenshot and let us know if this is not the expected behaviour. This would help in further triaging of the issue.

Thanks!

Deleted: 803226.png 252 KB

	803226.png 252 KB View Download

Those are not valid steps for the reported issue.  What's illustrated in the
screenshot above is that it's possible to get the current font styling on an
element via dev tools.  The reported issue is that the dev tools *protocol* has
an *event* named fontsUpdated, which fires whenever a web font gets loaded.
With the current implementation of this event, it is not possible to know
*which* font updated, because the event does not include any parameters.  This
can be seen by looking at the protocol source directly:
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/inspector/browser_protocol.json?l=2264&rcl=6ea06ef7f98d79c4fc87749fc3b860961f3345ad.
Note how there is no "parameters" key in the specification for fontsUpdated.

Thank you for providing more feedback. Adding requester "sc00335628@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Proposed CL: https://chromium-review.googlesource.com/c/chromium/src/+/905829

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bf7bdf59830d9d9e48d73278457cc1e9173f702d

commit bf7bdf59830d9d9e48d73278457cc1e9173f702d
Author: Bryce Thomas <bryct@amazon.com>
Date: Thu Mar 01 13:24:03 2018

Add fontLoaded event to dev tools protocol CSS domain.

This event notifies the dev tools client when a web font has successfully
loaded.  Event information includes the font-family, src, and other font
properties, as well as the resolved platform font family name.

R=dgozman@chromium.org

Bug:  803226 
Change-Id: I2bb399ce1c08b0a397f8eb94d95aa85556ebb2c1
Reviewed-on: https://chromium-review.googlesource.com/905829
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540145}
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/AUTHORS
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/inspector-protocol/css/css-fonts-updated-event-expected.txt
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/inspector-protocol/css/css-fonts-updated-event.js
[delete] https://crrev.com/ae6987e12b572be56b43368781235272817c0193/third_party/WebKit/LayoutTests/inspector-protocol/css/resources/ahem.css
[add] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/inspector-protocol/css/resources/noto-mono.css
[add] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/third_party/NotoMono-hintedLocalizedFamilyName/LICENSE_OFL.txt
[add] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/third_party/NotoMono-hintedLocalizedFamilyName/NotoMono-Regular.subset.ttf
[add] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/third_party/NotoMono-hintedLocalizedFamilyName/README
[add] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/LayoutTests/third_party/NotoMono-hintedLocalizedFamilyName/README.chromium
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/css/StyleEngine.cpp
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.h
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/inspector/browser_protocol.json
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/inspector/browser_protocol.pdl
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/core/probe/CoreProbes.pidl
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/platform/fonts/FontCustomPlatformData.cpp
[modify] https://crrev.com/bf7bdf59830d9d9e48d73278457cc1e9173f702d/third_party/WebKit/Source/platform/fonts/FontCustomPlatformData.h