commit e33f84d0812a99ff1bafdbf925b24dccef31b85c
author Mark Zhou <markzipan@google.com> Fri Aug 28 16:27:18 2020 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> Fri Aug 28 16:27:18 2020 +0000
tree 436b3e8057600bd95c1d5b7c87f0d593dfa79d67
parent 7e0412a68c16de717d8351ef3dbcf4958c8dabdc

[dartdevc] Adding custom prototype for MemoryInfo to accommodate Chrome API changes

Chrome Canary no longer exposes window.performance.memory's constructor (it uses Object's instead). This hack lets (window.performance.memory is html.MemoryInfo) evaluate to true.

See: https://github.com/dart-lang/sdk/issues/43193
Change-Id: I3c557467c3ea029052aba71f6695f4db0ec65515
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/160782
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Mark Zhou <markzipan@google.com>

sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart

diff --git a/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart b/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart
index 4867462..f07c4d8 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart
@@ -77,7 +77,8 @@
     }
     if (typeof $window.MemoryInfo == "undefined") {
       if (typeof $window.performance.memory != "undefined") {
-        $window.MemoryInfo = $window.performance.memory.constructor;
+        $window.MemoryInfo = function () {};
+        $window.MemoryInfo.prototype = $window.performance.memory.__proto__;
       }
     }
     if (typeof $window.Geolocation == "undefined") {