Adds in conversion

Summary: This is awesome.

Test Plan: We should check that arc diff works.

Reviewers: sushma-unii

Differential Revision: http://xcode.local:81/D2
Adds in conversion

Summary: This is awesome.

Test Plan: We should check that arc diff works.

Reviewers: sushma-unii

Reviewed By: sushma-unii

Differential Revision: http://xcode.local:81/D2