Add keyboard shortcut for exporting all bookmarks

[hamirmahal]

Test plan

1. Have some bookmarks already loaded (bookmark a few sites)
2. Visit brave://settings/system/shortcuts
3. Find the shortcut for Export all bookmarks (you can search if it's easier)
4. Bind this to Ctrl + Shift + E
5. Close the tab
6. Try out the shortcut (Ctrl + Shift + E). Doesn't matter what tab you have open,
7. It should pop up a modal with where to save
8. Verify the exported file looks good and that it saved to where you picked it

Description

If you wanted to add a command for exporting bookmarks and/or clearing downloads we'd definitely accept a PR

Originally posted by @fallaciousreasoning in #39489 (comment)

[jonathansampson]

This is looking good, but unfortunately doesn't build in its current state due to no ExportBookmarks member on the chrome namespace.

[bsclifton]

@hamirmahal I added a test plan to your top post - let me know what you think!

[hamirmahal]

It looks reasonable!

I just downloaded brave-browser-nightly and tried out the feature.

[hamirmahal]

Screen Recording of Feature

This is on brave-browser-nightly.

Screencast.from.11-11-2024.04.19.22.PM.webm

[fallaciousreasoning]

Looks great!

[rebron]

Beautiful. Works great. Thanks @hamirmahal

[hamirmahal]

You're welcome, @rebron.

[MadhaviSeelam]

Verification PASSED using

Brave | 1.75.145 Chromium: 132.0.6834.57 (Official Build) nightly (64-bit)
-- | --
Revision | 4ecdecd1626892f9f317e9d8154c50cf8459d3bf
OS | Windows 11 Version 24H2 (Build 26100.2605)

1. Installed 1.75.145
2. launched Brave
3. added few bookmarks
4. opened brave://settings/system/shortcuts in a new tab
5. search by export
6. confirmed Export all bookmarks shortcut entry available
7. clicked Add
8. added shortcut (Ctrl + Shift + E) and clicked Save
9. opened a new tab
10. entered the shortcut ((Ctrl + Shift + E)) and saved bookmarks file
11. confirmed the Bookmarks file is saved as expected via brave://bookmarks

2025-01-06_10h24_41.mp4