Roll browser-protocol

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In case of failures or errors, reach out to someone from config/owner/COMMON_OWNERS.

Roll created at https://cr-buildbucket.appspot.com/build/8730060220994982993

R=devtools-waterfall-sheriff-onduty@rotations.google.com

Bug: none
Change-Id: I9701fea1d3f95ee8b648a6cf281abbabd1274270
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6055250
Bot-Commit: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Philip Pfaffe <pfaffe@chromium.org>

Author: devtools-ci-autoroll-builder

DEPS

@@ -24,7 +24,7 @@ vars = {
   'inspector_protocol_revision': 'f43f7515bcf291ed7413ba70b0c8514f842f9f5d',
 
   # Keeping track of the last time we rollerd the browser protocol files.
-  'chromium_browser_protocol_revision' : '1b9620229a34bbcf0dfb72b6014cc060460d618f',
+  'chromium_browser_protocol_revision' : '56d381a2dafbbe200c99ad7111cc7eb4be2e982b',
 
   'clang_format_url': 'https://chromium.googlesource.com/external/github.com/llvm/llvm-project/clang/tools/clang-format.git',
   'clang_format_revision': '3c0acd2d4e73dd911309d9e970ba09d58bf23a62',

third_party/blink/renderer/core/css/css_properties.json5

@@ -5983,7 +5983,6 @@
       field_template: "external",
       keywords: ["none"],
       typedom_types: ["Keyword"],
-      runtime_flag: "CSSViewTransitionClass",
     },
     {
       name: "view-transition-group",