- disable_post_processing
- disable_response_cache
- prevent_redirect
- reject_all_errors
@todo: add a query arg to exclude sanitizers.

…nditional

As Weston mentioned, this can simply use
the filter that exists,

…evel var

The filter in accept_validation_errors()
might not actually run,
if get_acceptable_errors() doesn't return anything.

This adds a callback for 'amp_validation_error_sanitized',
and also checks for the presence of the 'reject_all_errors'
query var in that callback.
The query var is accessed like:
?amp_flags[accept_excessive_css]

This prevents raising an 'excessive_css' error,
and simply prints all of the styling in the
<style amp-custom>

This is mainly intended for Standard mode,
as it would be strange to have an ?amp
query var, then one after it to disable AMP.
Still, there's an issue where on redirecting

in Transitional mode,
the query var is still present in the URL, like:
https://example.com/new-post-2/?amp_flags%5Bdisable_amp%5D

… arg

It's possible, though probably not common,
that a request would have ?amp
and the query arg to disable AMP.
When in Transitional mode, this will
cause a redirect to the non-AMP endpoint.
This ensures that the amp_flags query
var is stripped from the redirect URL.

This uses React on the front-end,
as it will use toggles,
and may need to de-select some toggles
when certain toggles are selected.
It might be a little too much to enqueue React
(wp-element) just for this, so I'll have
to revisit whether it's necessary.

Remove a test that looks to have caused
and undefined index error.

It looks like another function was running
on the same filter, and had an error.
So remove_remove_all_filters() for that filter.

It looks like these didn't fix the failing
Travis builds.
So instead, register the 'wp-element' script.

There is still much remaining,
including adding the toggles and styling.

Both in the name of the function
and the query var.
This is to stay consistent with other query vars
that have 'disable' in them,
like 'disable_amp'

Use the <ToggleControl> from Gutenberg,
though this still needs a lot of styling.

There's a 'View AMP version' link,
so it probably makes sense to have
these query vars available.

As discussed in the PR,
these will be rendered with PHP.

As Weston mentioned,
an option has a 'check mark' emoji next to it
if its query var is in the current URL.
This still might need more thought,
like whether these should always be present in the
admin bar, even on a non-AMP URL
where the AMP URL is blocked due to validation errors.

There used to be a JS file
for the WP Admin Bar,
but this is now handled in PHP.

test_is_validation_error_sanitized_and_get_validation_error_sanitization()
failed in the build,
so change the expected term_status.

Also, use different emojis for the checked and
unchecked states.

add_debugging_option_nodes()
depends on get_debugging_option_title(),
and that function recently changed.
So the test for add_debugging_option_nodes()
needs to be updated.

Mainly based on Alain's code example.
Change the individual checks for
the query var to a call to AMP_Debug::has_flag().

These aren't needed anymore in
AMP_Validation_Error_Taxonomy.

Minor edits, like changing:
assertEquals( false
to:
assertFalse(
Also, improve some DocBlocks.

To test the behavior with:
&amp_flags[disable_post_processing]=random-string

For example,
&amp_flags[disable_post_processing]=5555

This should help to
see how to use this.

Now, something like:
&amp_flags[disable_amp]
will be true.

…-args-debugging

* 'develop' of github.com:ampproject/amp-wp: (163 commits)
  Remove entries array test after completed.
  Update dependency core-js to v3.3.4 (#3624)
  Quick UX fixes (#3611)
  Fix most pressing RTL issues (#3558)
  Add test case for broken parent relationship
  Adapt broken test
  Throw a _doing_it_wrong() when an expected parent is not found
  Change template hierarchy query arguments to public
  Reuse data-set-focus to reliably match twentytwenty keyboard focus management
  Add tabindex attribute to modals
  Guess the role of a modal based on its classes
  Disable Code Editor (#3608)
  Update dependency postcss to v7.0.20 (#3613)
  Update dependency autoprefixer to v9.7.0 (#3614)
  Update dependency browserslist to v4.7.2 (#3612)
  Add rel=preconnect link for AMP CDN
  Fix block nav padding and margin (#3610)
  Adjust Gutenberg / WordPress requirement (#3609)
  Don't allow multiple CTA / attachment block to be pasted. (#3601)
  Fix page crashing when duplicating immovable blocks (#3593)
  ...