### Website or app

https://codesandbox.io/s/react-playground-forked-j4niq

### Repro steps

Emoji seem supported but produce strange symbole

![image](https://user-images.githubusercontent.com/24865815/133793744-55a55582-90ad-425f-8a40-4c061a3c1d80.png)

To test emoji on Window Os, use `[win]+[.]` 🟩


### How often does this bug happen?

Every time

### DevTools package (automated)

_No response_

### DevTools version (automated)

_No response_

### Error message (automated)

_No response_

### Error call stack (automated)

_No response_

### Error component stack (automated)

_No response_

### GitHub query string (automated)

_No response_
updaters: Array<SerializedElement> | null,
  |};
  type CommitProfilingMetadataMap = Map<number, Array<CommitProfilingData>>;
  type DisplayNamesByRootID = Map<number, string>;
  let currentCommitProfilingMetadata: CommitProfilingData | null = null;
  let displayNamesByRootID: DisplayNamesByRootID | null = null;
  let idToContextsMap: Map<number, any> | null = null;
  let initialTreeBaseDurationsMap: Map<number, number> | null = null;
  let initialIDToRootMap: Map<number, number> | null = null;
  let isProfiling: boolean = false;
  let profilingStartTime: number = 0;
  let recordChangeDescriptions: boolean = false;
  let rootToCommitProfilingMetadataMap: CommitProfilingMetadataMap | null = null;
  function getProfilingData(): ProfilingDataBackend {
    const dataForRoots: Array<ProfilingDataForRootBackend> = [];
    if (rootToCommitProfilingMetadataMap === null) {
      throw Error(
        'getProfilingData() called before any profiling data was recorded',
      );
    }
    rootToCommitProfilingMetadataMap.forEach(
      (commitProfilingMetadata, rootID) => {
        const commitData: Array<CommitDataBackend> = [];
        const initialTreeBaseDurations: Array<[number, number]> = [];
        const displayName =
          (displayNamesByRootID !== null && displayNamesByRootID.get(rootID)) ||
          'Unknown';
        if (initialTreeBaseDurationsMap != null) {
          initialTreeBaseDurationsMap.forEach((treeBaseDuration, id) => {
            if (