[clang-tidy] Cleanup namespace in utils folder.

Summary:
This is a step forward cleaning up the namespaces in clang-tidy/utils.
There is no behavior change.

Reviewers: alexfh

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D19819

llvm-svn: 268356
diff --git a/clang-tools-extra/unittests/clang-tidy/IncludeInserterTest.cpp b/clang-tools-extra/unittests/clang-tidy/IncludeInserterTest.cpp
index d21afbb2..928d1ce 100644
--- a/clang-tools-extra/unittests/clang-tidy/IncludeInserterTest.cpp
+++ b/clang-tools-extra/unittests/clang-tidy/IncludeInserterTest.cpp
@@ -33,9 +33,10 @@
       : ClangTidyCheck(CheckName, Context) {}
 
   void registerPPCallbacks(CompilerInstance &Compiler) override {
-    Inserter.reset(new IncludeInserter(Compiler.getSourceManager(),
-                                       Compiler.getLangOpts(),
-                                       IncludeSorter::IS_Google));
+    Inserter.reset(new utils::IncludeInserter(
+        Compiler.getSourceManager(),
+        Compiler.getLangOpts(),
+        utils::IncludeSorter::IS_Google));
     Compiler.getPreprocessor().addPPCallbacks(Inserter->CreatePPCallbacks());
   }
 
@@ -58,7 +59,7 @@
   virtual std::vector<StringRef> HeadersToInclude() const = 0;
   virtual bool IsAngledInclude() const = 0;
 
-  std::unique_ptr<IncludeInserter> Inserter;
+  std::unique_ptr<utils::IncludeInserter> Inserter;
 };
 
 class NonSystemHeaderInserterCheck : public IncludeInserterCheckBase {