Staging for cleanup of SkPicture-related headers

https://codereview.chromium.org/243173002



git-svn-id: http://skia.googlecode.com/svn/trunk/src@14258 2bbb7eff-a529-9590-31e7-b0007b416f81

• core/SkBBHFactory.cpp[Added - diff]
• core/SkPicture.cpp[diff]
• core/SkPictureRecorder.cpp[Added - diff]
• core/SkQuadTreePicture.cpp[diff]
• core/SkQuadTreePicture.h[diff]
• core/SkRTreePicture.cpp[diff]
• core/SkTileGrid.h[diff]
• core/SkTileGridPicture.cpp[diff]