Paste PDF into the editor from clipboard using Chrome does not work

Summary

Paste PDF into the editor from clipboard using Chrome does not work.

Environment

• JIRA 1000.695.1 (Cloud), JIRA 7.3.0 (Server)
• Chrome 55.0.2883.95
• macOS Sierra

Steps to Reproduce

Scenario1

1. Copy a PDF file in Finder.app
2. Open a JIRA issue in edit mode
3. Press Cmd + V in the editor

Scenario2

1. Open Terminal.app
2. Execute the following commands

   $ defaults write com.apple.screencapture type pdf
   $ killall SystemUIServer
   

1. Press Command + Control + Shift + 3 to capture a screenshot into the clipboard
2. Open a JIRA issue in edit mode
3. Press Cmd + V in the editor

Expected Results

The paste from the clipboard should work correctly in the both scenario.

Actual Results

Scenario1

The PDF wasn't attached to the page and the filename is just pasted as a text.

Scenario2

The paste failed silently.
If we monitor the step in developer tools, we can see the following JavaScript error.

batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9238 Uncaught TypeError: Cannot read property 'slice' of undefined
    at Object.b.convertBlobToImage (batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9238)
    at batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9286
    at new D (batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9286)
    at batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9286
    at G (batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9286)
    at a (batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9286)
    at batch.js?acjsFiveVersionEnabled=true&agile_global_admin_condition=true&jag=true&jaguser=true&jira-n…:9286
    at dispatch (batch.js?locale=ja-JP:120)
    at h (batch.js?locale=ja-JP:112)

When it comes to some of third-party apps, they try to store images as PDF when copying them into clipboard.
That's why these scenario should be also considered.

Notes

This problem might be caused by this browser's spec.
Even though we don't support pasting PDF from clipboard, it would be more user friendly if JIRA could show some error on the UI.

Workaround

Use the other browsers instead.