Moving to new Chromium code base

[kjozwiak]

There's a lot of work that went into 1.5.120 that spanned multiple Beta releases before we pushed into Release. However, nothing "new" was added in terms of features as this was basically a move to a newer code base. In the following milestone, you'll find all the work/issues and PR's that went into the 1.5.120 release:

• Android-Beta - https://github.com/brave/brave-browser/milestone/73?closed=1
• Android Beta Release 2 - https://github.com/brave/brave-browser/milestone/77?closed=1
• Android Beta Release 3 - https://github.com/brave/brave-browser/milestone/83?closed=1
• Android Beta Release 4 - https://github.com/brave/brave-browser/milestone/85?closed=1
• Android Beta Release 5 - https://github.com/brave/brave-browser/milestone/86?closed=1
• Android Beta Release 6 - https://github.com/brave/brave-browser/milestone/89?closed=1
• Android Beta Release 7 - https://github.com/brave/brave-browser/milestone/91?closed=1
• Android 1.5.x Release - https://github.com/brave/brave-browser/milestone/76?closed=1

You can find the old code base the the following:

• Brave Android Browser (old code base) - https://github.com/brave/browser-android-tabs
• CHANGELOG/Release notes (old code base) - https://github.com/brave/browser-android-tabs/blob/base-80.0.3987.132/CHANGELOG.md