Remove tr.b.findFirstKeyInDictMatching.

tracing/tracing/base/multi_dimensional_view_test.html

Index: tracing/tracing/base/multi_dimensional_view_test.html
diff --git a/tracing/tracing/base/multi_dimensional_view_test.html b/tracing/tracing/base/multi_dimensional_view_test.html
index 3fb428eb892eea8ad0225e212aec6e40b0cd9dfb..4722c4f853df2a0097a3c1edab9cbc0bd2bf1d8e 100644
--- a/tracing/tracing/base/multi_dimensional_view_test.html
+++ b/tracing/tracing/base/multi_dimensional_view_test.html
@@ -373,10 +373,15 @@ tr.b.unittest.testSuite(function() {
                             generator.push('self: ', String(value.self), ',');
                             generator.breakLine();
                             generator.push('totalState: ');
-                            const totalStateName =
-                                tr.b.findFirstKeyInDictMatching(
-                                    MultiDimensionalViewNode.TotalState,
-                                    (n, s) => s === value.totalState);
+
+                            let totalStateName;
+                            for (const [name, state] of Object.entries(
+                                MultiDimensionalViewNode.TotalState)) {
+                              if (state === value.totalState) {
+                                totalStateName = name;
+                                break;
+                              }
+                            }
                             if (totalStateName === undefined) {
                               throw new Error(
                                   'Unknown total state: ' + value.totalState);