14298 [fuchsia] Do not Execute paint tasks when there is no vsync (cla: yes)

14305 [web] Update build_web_compilers to 2.7.1 (cla: yes)

14309 Roll src/third_party/dart 98c13ba18f..c74a8ec2c4 (14 commits) (cla: yes)

14314 Roll fuchsia/sdk/core/mac-amd64 from 9C6UA… to h4iiT… (autoroller: commit, cla: yes)

14315 Roll src/third_party/skia 732c49739fa5..5afc7b2af854 (16 commits) (autoroller: commit, cla: yes)