Move RemoteMemoryReader into FastMalloc.cpp
https://bugs.webkit.org/show_bug.cgi?id=115985

Reviewed by Andreas Kling.

RemoteMemoryReader is only used in FastMalloc.cpp, and even had one of its member functions
implemented there, so move the entire class template there and remove MallocZoneSupport.h.

* GNUmakefile.list.am:
* WTF.pro:
* WTF.vcproj/WTF.vcproj:
* WTF.vcxproj/WTF.vcxproj:
* WTF.vcxproj/WTF.vcxproj.filters:
* WTF.xcodeproj/project.pbxproj:
* wtf/CMakeLists.txt:
* wtf/FastMalloc.cpp:
(WTF):
(PageHeapAllocator):
(WTF::TCMalloc_ThreadCache::CreateCacheIfNecessary):
* wtf/MallocZoneSupport.h: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149963 268f45cc-cd09-0410-ab3c-d52691b4dbfc