The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cfc30f28e0bb2b16793188e670f109d81c8f153d

commit cfc30f28e0bb2b16793188e670f109d81c8f153d
Author: einbinder <einbinder@chromium.org>
Date: Tue Sep 20 00:35:12 2016

DevTools: Add Ctrl-A and Ctrl-E shortcuts to CodeMirror
On Mac, Ctrl-A and Ctrl-E go to the start and end of a line respectively.

BUG= 648331 

Review-Url: https://codereview.chromium.org/2352793002
Cr-Commit-Position: refs/heads/master@{#419610}

[modify] https://crrev.com/cfc30f28e0bb2b16793188e670f109d81c8f153d/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js

Thanks

 Issue 656251  is related/a duplicate? Many of the standard OS X key bindings are missing, beyond Ctrl-A/Ctrl-E.
Ctrl-H - Delete character to left of insertion point
Ctrl-D - Delete character to right of insertion point
Ctrl-K - Delete text between insertion point and end of line
Ctrl-F - Move one character forward
Ctrl-B - Move one character backward