[libclang] Rename setBackGroundPriority -> setThreadBackgroundPriority.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153566 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndexCodeCompletion.cpp b/tools/libclang/CIndexCodeCompletion.cpp
index c5bc8c8..95ed3c4 100644
--- a/tools/libclang/CIndexCodeCompletion.cpp
+++ b/tools/libclang/CIndexCodeCompletion.cpp
@@ -668,7 +668,7 @@
 
   CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
   if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForEditing))
-    setBackGroundPriority();
+    setThreadBackgroundPriority();
 
   ASTUnit::ConcurrencyCheck Check(*AST);