Also reported in  issue 685674 .
Quote:
	Bisect: 445634 (good) - 445645 (bad)
	https://chromium.googlesource.com/chromium/src/+log/2322e5d5..91d7a775?pretty=fuller
	The only devtools-related change is r445638 "DevTools: restore shortcuts to switch devtool panel left/right" - tracked in  issue 683140 .
	Typing [] in an Italian keyboard layout requires pressing AltGr (right-side Alt), which gets misinterpreted as a tab-switch modifier.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/85d052a58e40fa393e1daa4e3b1848c2b0530607

commit 85d052a58e40fa393e1daa4e3b1848c2b0530607
Author: einbinder <einbinder@chromium.org>
Date: Wed Feb 08 00:54:50 2017

DevTools: Don't trigger panel switcher shortcut if alt key is held

On Windows with some international keyboard layouts, typing [ might
report that both ctrl and alt are pressed.

BUG= 685993 

Review-Url: https://codereview.chromium.org/2680773003
Cr-Commit-Position: refs/heads/master@{#448824}

[modify] https://crrev.com/85d052a58e40fa393e1daa4e3b1848c2b0530607/third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js

 Issue 690133  has been merged into this issue.

 Issue 691260  has been merged into this issue.

Verified the fix on the latest canary(58.0.3018.0) on Windows-10 and this is WAI. AltGr+8/9 enters [] in the console without switching the tabs.

einbinder@: Please close the issue if there is no further work to be done here.

Deleted: 685993.png 132 KB

	685993.png 132 KB View Download

 Issue 685674  has been merged into this issue.

(I explicitly asked that this was merged in the code review...)

This bug requires manual review: Request affecting a post-stable build
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid@(ChromeOS), govind@(Desktop)

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

This is a one-line fix that landed on Feb 8th. More that one month in Canary with no issues, safe to merge.

Approving merge to M57 branch 2987 based on comment #12. Please merge ASAP. Thank you.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8e36e1c3d473f53199e9bdfb841fcfaf4c317dad

commit 8e36e1c3d473f53199e9bdfb841fcfaf4c317dad
Author: Alexey Kozyatinskiy <kozyatinskiy@chromium.org>
Date: Wed Mar 15 20:04:53 2017

DevTools: Don't trigger panel switcher shortcut if alt key is held

On Windows with some international keyboard layouts, typing [ might
report that both ctrl and alt are pressed.

BUG= 685993 

Review-Url: https://codereview.chromium.org/2680773003
Cr-Commit-Position: refs/heads/master@{#448824}
(cherry picked from commit 85d052a58e40fa393e1daa4e3b1848c2b0530607)

Review-Url: https://codereview.chromium.org/2751833009 .
Cr-Commit-Position: refs/branch-heads/2987@{#829}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}

[modify] https://crrev.com/8e36e1c3d473f53199e9bdfb841fcfaf4c317dad/third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js

einbinder@/pfeldman@, Requesting a postmortem for this issue. 

(please see go/chrome-postmortems for the process to follow). Thank you.

Verified this issue on Windows-10 using chrome latest stable M57-57.0.2987.110 by following steps mentioned in the comment #7, Observed the square braces is printed in console as expected. Hence adding TE-Verified label.

Thanks!

 Issue 702032  has been merged into this issue.

 Issue 703117  has been merged into this issue.

Requesting a postmortem for this (please see go/chrome-postmortems for the process to follow). Thank you.

 Issue 707564  has been merged into this issue.