Chrome Browser Version: 69.0.3497.95(Official Build)(64-bit)
Chrome OS Version: 10895.56.0(Official Build) stable-channel-gnawty

What steps will reproduce the problem?
(1) Install Office Editing for Docs, Sheets & Slides extension from Chrome Web Store.
(2) Sign-in to Gmail > Go to Settings > Set the Display Density to Default View
(3) Notice that mail attachments are displayed in the mail list view.
(4) Click on MS Office file attachment > Notice the behaviour

What is the expected result?
Open with Google Docs/Sheets/Slides option should be present

What happens instead?
Open with Google Docs/Sheets/Slides option is missing on the first screen.
User has to click 'Open in new window' option from more actions button.
Then the second screen is launched in a new tab where 'Open with Google Docs/Sheets/Slides option is present.

Additional information-
In Compact/ Comfortable view of new Gmail, Open with Google Docs/Sheets/Slides option appears on the first screen itself when user clicks the MS Office file attachment.

Please refer attached videos.
 

Deleted: Gmail_Compact_Comfortable_View.webm 4.9 MB

	Gmail_Compact_Comfortable_View.webm 4.9 MB View Download

Deleted: Gmail_Default_View.webm 4.3 MB

	Gmail_Default_View.webm 4.3 MB View Download

Chrome Browser Version: 69.0.3497.95(Official Build)(64-bit)
Chrome OS Version: 10895.56.0(Official Build) stable-channel-gnawty

What steps will reproduce the problem?
(1) Sign-in to Gmail > Go to Settings > Set the Display Density to Default View
(2) Notice that mail attachments are displayed in the mail list view.
(3) Select an email having file attachments (.doc/.xls/.ppt/.pdf)
(3) Click on a file attachment > Notice the behaviour

What is the expected result?
Open with Google Docs/Sheets/Slides option should be present

What happens instead?
Open with Google Docs/Sheets/Slides option is missing on the first screen.
User has to click 'Open in new window' option from more actions button.
Then the second screen is launched in a new tab where 'Open with Google Docs/Sheets/Slides option is present.

Additional information-
In Compact/ Comfortable view of new Gmail, Open with Google Docs/Sheets/Slides option appears on the first screen itself when user clicks the file attachment.

Please refer attached videos.