Mehdi Amini 492acdd450 Remove some unneeded headers and replace some headers with forward class declarations (NFC)
Differential Revision: http://reviews.llvm.org/D19154

Patch by Eugene Kosov <claprix@yandex.ru>

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266524 91177308-0d34-0410-b5e6-96231b3b80d8
2016-04-16 07:51:28 +00:00
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