Framework: Upgrade to React 15.4.0

[aduth]

Supersedes #9312

This pull request seeks to upgrade our React dependencies from 15.3.0 to 15.4.0 .

Changelogs:

• 15.4.0 (blog announcement)
• 15.3.2
• 15.3.1

Being a minor version bump, there aren't expected to be backwards-incompatible changes, though because we use internal undocumented libraries for our translate mixin, these were broken as part of the upgrade. Long-term we should seek to update all existing components to use the localize higher-order component, but in the meantime I've updated the existing references to their updated values, i.e.:

• Before: require( 'react/lib/ReactInjection' ).Class.injectMixin
• After: require( 'react/lib/ReactClass' ).injection.injectMixin

The react-tap-event-plugin package was similarly affected by shuffled internal lib paths and has been updated as part of this pull request (see changelog).

Testing instructions:

Verify that the application boots and runs without any issue, and that tests continue to pass.

cc @mtias @timmyc @ockham

[matticbot]

Test live: https://calypso.live/?branch=update/react-15-4-0

[timmyc]

No apparent improvements to the development console woes in Firefox, but in my testing of random aspects of Calypso, all seems to be working well for me. I tried to test out the areas changed in the branch like plugins list specifically.

[blowery]

My best recommendation if you need this is to build a component or similar completely in user space without depending on React internals. It should also be possible to fix up react-tap-event-plugin for v15, but we don't support that and can't guarantee that it will still work in a future release. source

Sigh.

[ockham]

Looks good, and tests well. Specifically, i18n still works, which seems the only actual change to production code that was required because of the ReactInjection.Class -> ReactClass.injection change.

Looking forward to this, since apparently it will make profiling React components easier!