This is a backport of 6c3647c38d from
v0.12 to v0.10.
Console.prototype.timeEnd() returns NaN if the timer label
corresponds to a property on Object.prototype. In v0.12, this was fixed
by using Object.create(null) to construct the _times object
However, the version of V8 in the v0.10 branch makes this fix not work
as expected. In v0.10, this commit changes the _times object into a
array of objects of the form:
{ label: someLabel, time: staringWallClockTime }
someLabel can thus be any string, including any string that represents
any Object.prototype field.
Fixes#9116
This commit removes one assert from test-console.js in which we check that
process.stderr.write returns true. In the case of a dump to a file we cannot
guarantee this any longer now that it goes through fs.WriteStream.