Math.fround not recognized

[kripken]

Compiling with advanced opts, Math.fround is not recognized and is minified into an invalid Math.a. A warning is shown,

JSC_INEXISTENT_PROPERTY_WITH_SUGGESTION: Property fround never defined on Math. Did you mean round? at line 3 character 32

For an example, see here

[brad4d]

Created Google internal bug b/119306748

[brad4d]

FYI @shicks is actively working to fix this.

[brad4d]

Fixed in 5d04b3c