[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/CIndexer.h b/tools/libclang/CIndexer.h
index f8cb8dc..c8c48e9 100644
--- a/tools/libclang/CIndexer.h
+++ b/tools/libclang/CIndexer.h
@@ -90,7 +90,7 @@
 
   /// \brief Set the thread priority to background.
   /// FIXME: Move to llvm/Support.
-  void setBackGroundPriority();
+  void setThreadBackgroundPriority();
 
   /// \brief Print libclang's resource usage to standard error.
   void PrintLibclangResourceUsage(CXTranslationUnit TU);