- Remove the InstallFunction variant which just passed its arguments
  straight to JSObject::AddProperty
- Change InstallFunction to accept a String rather than a Symbol as all
  symbol installation goes through InstallFunctionAtSymbol now. This way
  we can avoid the call to Name::ToFunctionName as well
- Add an explicit helper InstallFunctionWithBuiltinId for installing
  functions which have a builtin ID. These are always installed with
  DONT_ENUM PropertyAttributes so we can remove that parameter, too.
- Remove PropertyAttributes from InstallFunction because it is always
  DONT_ENUM.

Bug: v8:8238
Change-Id: I7af3d6d833d50065c20e198e21a72ef4a539c1ca
Reviewed-on: https://chromium-review.googlesource.com/c/1349284Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57789}