port 471893cc (r36649)

  original commit message:
  GenerateSmiToDouble on ia32 assumes that it is called from a JSFrame and can restore
  the context from the StandardFrameConstants::kContextObject. In the case of the
  interpreter it is called from a interpreter handler stub frame which doesn't
  push the context onto it's frame. Instead, push and pop esi to explicitly restore it
  correctly.

BUG=

Review-Url: https://codereview.chromium.org/2036083003
Cr-Commit-Position: refs/heads/master@{#36702}