Merged r15610, r15723, r15724, r15725, r15728 into 3.18 branch.

HasRealIndexedProperty doesn't work on JSGlobalProxy

Synchronize Compare-Literal behavior in FullCodegen and Hydrogen

There is no undefined Literal.

Fix LiteralCompareTypeof breakage introduced in r15723

Better fix for LiteralCompareTypeof

R=jkummerow@chromium.org
BUG=chromium:257748,chromium:260345

Review URL: https://codereview.chromium.org/19518008

git-svn-id: https://v8.googlecode.com/svn/branches/3.18@15801 ce2b1a6d-e550-0410-aec6-3dcde31c8c00