[Target][NFC] Rename GetCPPLanguageRuntime to Get

This is a followup to rL362981, in which I moved GetObjCLanguageRuntime
from Process to ObjCLanguageRuntime, renaming it to Get along the way.

llvm-svn: 362984
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index 01b3a7e..7dc765c 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -67,8 +67,7 @@
   if (process == nullptr)
     return false;
 
-  CPPLanguageRuntime *cpp_runtime =
-      CPPLanguageRuntime::GetCPPLanguageRuntime(*process);
+  CPPLanguageRuntime *cpp_runtime = CPPLanguageRuntime::Get(*process);
 
   if (!cpp_runtime)
     return false;