When buildCounter returns null it no longer produces a widget that takes up space.

* ee92285ab Roll src/third_party/skia fdb2b7d53038..cbeabd969bbe (1 commits) (flutter/engine#14530)

* 9b369ad19 Rename 'test_vsync_waiters' to 'vsync_waiters_test' for consistency. (flutter/engine#14519)

* 0f97a1e83 Roll src/third_party/skia cbeabd969bbe..3794db84e141 (8 commits) (flutter/engine#14532)

* ac42640fd Roll src/third_party/dart f10fa3df28a8..44da51fc720d (20 commits) (flutter/engine#14533)

* c216ba42b Calling onConnectionClosed when the input element is blurred (flutter/engine#14484)

* 44f075779 Manual roll of Dart to revision 8a4cac1ddb141d4a1e395f6e0a7d5bbf2247eb63 (flutter/engine#14542)

* 995c4a786 Roll src/third_party/dart 8a4cac1ddb14..b6e051e2c87a (2 commits) (flutter/engine#14545)

* c5683085d Roll src/third_party/skia 190b82d67ce1..37a88b43637e (1 commits) (flutter/engine#14546)

* c327cae7a Revert "Fix off-by-one fromRGBO alpha value calculation (#13777)" (flutter/engine#14548)

* c2600574f Roll src/third_party/dart fe9f30c3896e..8ad8abfb7463 (19 commits) (flutter/engine#14480)

* 47c1dde9c Roll src/third_party/skia d0840ecf5831..ea47b0e65802 (9 commits) (flutter/engine#14481)

* 35adf37ce [web] Implement Paragraph.getLineBoundary (flutter/engine#14479)

* 00cbfd3f7 [web] Remove Paragraph._lines which isn't necessary anymore (flutter/engine#14485)

* d6172fdcf libtxt: cache fallback fonts found by a Minikin font collection (flutter/engine#14482)

* 19124783c adding firefox unit tests to font loading (flutter/engine#14487)

* 6c71f89fb Introduce an auto-deletable SkiaObject; make SkPaint a SkiaObject (flutter/engine#14486)

* 2026b83d7 Roll src/third_party/dart 8ad8abfb7463..83eeab1e63d9 (13 commits) (flutter/engine#14488)

* b43d3fe38 Roll src/third_party/skia ea47b0e65802..cd9ad409a90d (7 commits) (flutter/engine#14490)

* 3c85b828e Roll fuchsia/sdk/core/linux-amd64 from QZVxo... to q0tup... (flutter/engine#14494)

* 3e3eb9c0a Roll src/third_party/dart 83eeab1e63d9..6c99171686be (5 commits) (flutter/engine#14492)

* cbe0e6c1e Roll src/third_party/skia cd9ad409a90d..cf0e3c63fd22 (1 commits) (flutter/engine#14495)

* a653bd8b4 Roll fuchsia/sdk/core/mac-amd64 from 5t09i... to esDH2... (flutter/engine#14493)

* 17d8882a7 Roll src/third_party/dart 6c99171686be..09a0b040dd9b (1 commits) (flutter/engine#14497)

* be9c7c9f6 Roll src/third_party/skia cf0e3c63fd22..9e7199561fc8 (1 commits) (flutter/engine#14499)

* c504b8fab Roll src/third_party/skia 9e7199561fc8..ef363a9ce692 (1 commits) (flutter/engine#14500)

* cf20f87b7 Roll src/third_party/dart 09a0b040dd9b..ae3973da4023 (1 commits) (flutter/engine#14501)

* bb3166bce Roll src/third_party/dart ae3973da4023..24b99838f433 (3 commits) (flutter/engine#14502)

* 87c1110df Roll src/third_party/skia ef363a9ce692..187cd367d388 (1 commits) (flutter/engine#14503)

* 45c6c3a5d Roll src/third_party/skia 187cd367d388..706eb5788e8b (1 commits) (flutter/engine#14505)

* d2923801b Fix comments of iOS status bar height constant (flutter/engine#14496)

* 1ed724718 Roll src/third_party/dart 24b99838f433..2e1dd98e5e7f (1 commits) (flutter/engine#14507)

* 871246172 Allow custom embedders to post low memory notifications. (flutter/engine#14506)

* 1d1eae2ed Roll fuchsia/sdk/core/linux-amd64 from q0tup... to O6ELR... (flutter/engine#14512)

* 8b478862d Roll src/third_party/dart c5c469088697..44ba80053396 (1 commits) (flutter/engine#14510)

* ca799fa8b Roll src/third_party/skia 706eb5788e8b..9b59953e77b9 (3 commits) (flutter/engine#14511)

* 84564111f Roll src/third_party/dart 44ba80053396..2eba06d26f71 (32 commits) (flutter/engine#14515)

* 46d76eb8e Roll src/third_party/skia 9b59953e77b9..d78a9b45b9e5 (23 commits) (flutter/engine#14516)

* 5f9e558a9 Forward low memory notifications from the shell to DartVM. (flutter/engine#14517)

* dc597584e Apply SmoothPointerDataDispatcher to Fuchsia (flutter/engine#14514)

* 9556f2c82 Roll src/third_party/dart 2eba06d26f71..b1afe2d0ebc1 (6 commits) (flutter/engine#14523)

* e829384a2 Roll fuchsia/sdk/core/linux-amd64 from O6ELR... to ZHhOi... (flutter/engine#14525)

* 0fbdeb8d2 Roll src/third_party/dart b1afe2d0ebc1..2d332ee1d3f1 (1 commits) (flutter/engine#14526)

* 500f9cedf Roll src/third_party/skia 6153165d78f2..fdb2b7d53038 (2 commits) (flutter/engine#14528)

Revert "Check Xcode build setting FULL_PRODUCT_NAME for the name of the built app during flutter run (#46928)" (#47264)

This reverts commit e54e301d.

Check Xcode build setting FULL_PRODUCT_NAME for the name of the built app during flutter run (#46928)

* Implement date parsing for the gen_l10n tool

* 7922bc80e [web] adding firefox unit tests to font loading (flutter/engine#14467)

* 4ca54fe2c Roll src/third_party/dart c561a9eacc1b..fe9f30c3896e (7 commits) (flutter/engine#14475)

* b616dcd5d Roll fuchsia/sdk/core/linux-amd64 from sBbWo... to QZVxo... (flutter/engine#14473)

* 1377ef680 Roll src/third_party/skia c514e7d9be6e..d0840ecf5831 (18 commits) (flutter/engine#14478)

* bdd4e4d94 Do not assume that createTypeface is called before getStyle in the AssetManagerFontStyleSet (flutter/engine#14343)

In #45392, the Windows shard values were bumped up to 4 CPU
and 12GB RAM across the board to make tests pass. This change
gives each shard values that make sense for that shard, thus
allowing shards to run faster while conserving resources where
possible.