Import analyzer ast with explicit show. - #4300

Note: until dart-lang/dartdoc#4300 lands, we temporarily use `TopLevelVariable2`. Renaming would be an easy mechanical change later.

Top-level variables were parsed as a V1 `TopLevelVariableDeclaration`
containing a `VariableDeclarationList` shared with fields and local
variables, and passes recovered whether a variable is top-level by
inspecting its grandparent.

They are now canonical V2 nodes: a `TopLevelVariablesDeclaration`, one
declaration that owns the comment, metadata, modifiers, type, and
semicolon, and contains `TopLevelVariable`s, each with a name, an
initializer, and a precise `TopLevelVariableFragment?`. The group
exposes the `const`, `final`, or `var` modifier as tokens, as
`FormalParameter` does, without `isConst`, `isFinal`, or `isLate`
flags.

`TopLevelVariableDeclarationImpl` is now a V1-only projection.
`VariableDeclarationListImpl` and `VariableDeclarationImpl` are still
canonical for fields and local variables, so they are canonical nodes
or projections of the V2 top-level variables, depending on how they
are created. `TopLevelVariableImpl` implements `VariableBindingImpl`,
so initializer resolution, top-level inference, and constant
evaluation are shared with fields and locals.
`visitTopLevelVariableDeclaration` is removed from the V2 visitors and
`addTopLevelVariableDeclaration` from `RuleVisitorRegistry2`; the V1
`RuleVisitorRegistry.addTopLevelVariableDeclaration` remains.

Bug: #64004
Change-Id: I962e1a75b8feed28f24df5ca796362d0f282458f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/564703
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

…, web

Revisions updated by `dart tools/rev_sdk_deps.dart`.

core (https://github.com/dart-lang/core/compare/4d80610..72e71ca):
  72e71ca0  Mon Oct 19 21:57:11 2026 +0200  Jonas Finnemann Jensen  Optimize `HashSink` and `_MD5Sink.updateHash` (RFC impl) (dart-lang/core#1013)

dartdoc (https://github.com/dart-lang/dartdoc/compare/e1859cf..c0e19cf):
  c0e19cf6  Mon Oct 19 11:41:42 2026 -0700  Konstantin Scheglov  Import analyzer ast with explicit show. (dart-lang/dartdoc#4300)

ecosystem (https://github.com/dart-lang/ecosystem/compare/622ef61..0ab0cfd):
  0ab0cfd  Mon Oct 19 15:44:26 2026 +0200  Moritz  fix(firehose): bump dependency_validator to support analyzer 14 (dart-lang/ecosystem#453)
  44a0768  Wed Oct 14 09:37:29 2026 -0700  Nate Bosch  Improve firehose publish validation log output (dart-lang/ecosystem#468)

http (https://github.com/dart-lang/http/compare/7d7aae2..a8a24a0):
  a8a24a0  Mon Oct 19 13:31:34 2026 -0700  Kevin Moore  docs(web_socket): remove non-user-visible changelog entry (dart-lang/http#2023)
  6f6ac5f  Mon Oct 19 16:29:43 2026 -0400  Mouad Debbar  [http_multi_server] Retry `loopback(0)` when IPv6 port is already bound (dart-lang/http#2025)
  6e91ce3  Tue Oct 13 16:25:39 2026 -0700  Kevin Moore  Sync root README.md package table from pubspec.yaml files (dart-lang/http#2024)

native (https://github.com/dart-lang/native/compare/cc7e4b0..3cbe319):
  3cbe319e3  Tue Oct 13 15:47:18 2026 +0200  Daco Harkes  [hooks_runner] Fail eagerly when file locking is not supported on file system (dart-lang/native#3679)

shelf (https://github.com/dart-lang/shelf/compare/b2cb503..b66665b):
  b66665b  Fri Oct 16 15:12:05 2026 -0700  Kevin Moore  chore: add health workflow and prepare shelf 1.4.3, shelf_router 1.1.5, and shelf_static 1.2.0 (dart-lang/shelf#546)

test (https://github.com/dart-lang/test/compare/9bf69a8..d1afeb1):
  d1afeb14  Fri Oct 16 20:41:51 2026 -0400  Mouad Debbar  Confirmation that `tearDown` is called on timeout (dart-lang/test#2798)
  3f6c2f14  Thu Oct 15 18:21:35 2026 -0700  Jacob MacDonald  Enable asserts in the cli compiler (dart-lang/test#2795)

tools (https://github.com/dart-lang/tools/compare/c1471db..f6c7a2d):
  f6c7a2d62  Mon Oct 19 07:59:24 2026 -0700  Kevin Moore  [pubspec_parse] Preserve input maps and YamlMap source spans (dart-lang/tools#2653)
  f1a55d953  Mon Oct 19 07:53:51 2026 -0700  Kevin Moore  [yaml] Fix tag URI decoding, numeric tag RangeErrors, and dead checks (dart-lang/tools#2630)
  340ded284  Mon Oct 19 07:43:31 2026 -0700  Kevin Moore  [unified_analytics] Prepare for 8.2.0 release (dart-lang/tools#2689)
  a73703543  Fri Oct 16 11:55:03 2026 -0700  Kevin Moore  [unified_analytics] Bump version to 8.2.0-wip (dart-lang/tools#2688)

web (https://github.com/dart-lang/web/compare/63e6662..4e60e61):
  4e60e61  Mon Oct 19 10:02:22 2026 -0700  dependabot[bot]  Bump source-map-js from 1.2.1 to 1.2.2 in /web_generator (dart-lang/web#591)
  7d63637  Mon Oct 19 09:50:26 2026 -0700  Kevin Moore  Add an api.txt golden for package:web (dart-lang/web#590)

[email protected]

Change-Id: Ibe6ac8a8246a27caa8a4846ea1acc78c801ee2ae
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/566781
Commit-Queue: Nate Bosch <[email protected]>
Reviewed-by: Brian Quinlan <[email protected]>

https://dart-review.googlesource.com/c/sdk/+/564703 adds new top-level
names that conflict with names used in DartDoc.