Implemented clang-tidy-check-specific options.

Summary:
Each check can implement readOptions and storeOptions methods to read
and store custom options. Each check's options are stored in a local namespace
to avoid name collisions and provide some sort of context to the user.

Reviewers: bkramer, klimek

Reviewed By: klimek

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D5296

llvm-svn: 217661
diff --git a/clang-tools-extra/clang-tidy/llvm/NamespaceCommentCheck.h b/clang-tools-extra/clang-tidy/llvm/NamespaceCommentCheck.h
index 8793280..f1b92e7 100644
--- a/clang-tools-extra/clang-tidy/llvm/NamespaceCommentCheck.h
+++ b/clang-tools-extra/clang-tidy/llvm/NamespaceCommentCheck.h
@@ -21,13 +21,16 @@
 /// see: http://llvm.org/docs/CodingStandards.html#namespace-indentation
 class NamespaceCommentCheck : public ClangTidyCheck {
 public:
-  NamespaceCommentCheck();
+  NamespaceCommentCheck(StringRef Name, ClangTidyContext *Context);
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 
 private:
+  void storeOptions(ClangTidyOptions::OptionMap &Options) override;
+
   llvm::Regex NamespaceCommentPattern;
   const unsigned ShortNamespaceLines;
+  const unsigned SpacesBeforeComments;
 };
 
 } // namespace tidy