[PATCH] D60850: [sema][objc] Minor refactor to OverrideSearch. NFCI.

[Matt Davis via Phabricator via llvm-commits]

mattd created this revision.
mattd added a reviewer: rjmccall.

- Removed a member that was only used during construction.
- Use range-based for iteration when accessing the result of the search.
- Require an `ObjCMethodDecl` reference upon construction of an `OverrideSearch` instance.
- Constify.


https://reviews.llvm.org/D60850

Files:
  clang/lib/Sema/SemaDeclObjC.cpp

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