DevTools: remove selections on dropdown menu open

DevTools: remove selections on dropdown menu open

Operating systems have native behavior to add items to context menus such as
'Copy' when selecting text. Opening a dropdown menu does not carry the same
intent, so removing prior selections avoids unnecessary items.

Some items including 'Add to iTunes as spoken track' remember the last selection
and are unavoidable without altering system preferences.

BUG=687466

[luoe, 2017-02-24 07:46:00]

luoe@chromium.org changed reviewers:
+ lushnikov@chromium.org

[luoe, 2017-02-24 07:46:01]

ptal

[luoe, 2017-02-25 03:01:10]

Description was changed from

==========
DevTools: remove selections on dropdown menu open

Operating systems have native behavior to add items to context menus such as
'Copy' when selecting text. Opening a dropdown menu does not carry the same
intent, so removing prior selections avoids unnecessary items.

Some items including 'Add to iTunes as spoken track' remember the last selection
and are unavoidable without altering system preferences.

BUG=687466
==========

to

==========
DevTools: remove selections on dropdown menu open

Operating systems have native behavior to add items to context menus such as
'Copy' when selecting text. Opening a dropdown menu does not carry the same
intent, so removing prior selections avoids unnecessary items.

Some items including 'Add to iTunes as spoken track' remember the last selection
and are unavoidable without altering system preferences.

BUG=687466
==========

[luoe, 2017-02-25 03:01:10]

luoe@chromium.org changed reviewers:
+ einbinder@chromium.org

[luoe, 2017-02-27 19:00:00]

For reference, DropdownMenus are used in the '>>' menu in a TabbedPane.  Regular
context menus are not affected.

[lushnikov, 2017-03-03 04:11:00]

https://codereview.chromium.org/2718623002/diff/1/third_party/WebKit/Source/d...
File third_party/WebKit/Source/devtools/front_end/ui/DropDownMenu.js (right):

https://codereview.chromium.org/2718623002/diff/1/third_party/WebKit/Source/d...
third_party/WebKit/Source/devtools/front_end/ui/DropDownMenu.js:27: var
selection = UI.inspectorView.element.window().getSelection();
it would be nice if we can create context menus without this system subitems.

Let's try to improve our context menus!

[einbinder, 2017-03-09 09:35:12]

lgtm

[luoe, 2017-05-10 20:48:01]

luoe@chromium.org changed reviewers:
- einbinder@chromium.org, lushnikov@chromium.org