[Clang] Migrate llvm::make_unique to std::make_unique

Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.

Differential revision: https://reviews.llvm.org/D66259

llvm-svn: 368942
diff --git a/clang/lib/StaticAnalyzer/Checkers/DeleteWithNonVirtualDtorChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/DeleteWithNonVirtualDtorChecker.cpp
index 2059ff6..990e3c2 100644
--- a/clang/lib/StaticAnalyzer/Checkers/DeleteWithNonVirtualDtorChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/DeleteWithNonVirtualDtorChecker.cpp
@@ -92,11 +92,11 @@
                          "Logic error"));
 
   ExplodedNode *N = C.generateNonFatalErrorNode();
-  auto R = llvm::make_unique<BugReport>(*BT, BT->getName(), N);
+  auto R = std::make_unique<BugReport>(*BT, BT->getName(), N);
 
   // Mark region of problematic base class for later use in the BugVisitor.
   R->markInteresting(BaseClassRegion);
-  R->addVisitor(llvm::make_unique<DeleteBugVisitor>());
+  R->addVisitor(std::make_unique<DeleteBugVisitor>());
   C.emitReport(std::move(R));
 }