Rename "parallel recompilation" to "concurrent recompilation".

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index 18a6e566c6c7b98d799f19571fe62e8d6b095d27..ca8216b1f5330f180013798b36b3b69ba1860063 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -115,7 +115,7 @@ void Builtins::Generate_InstallRecompiledCode(MacroAssembler* masm) {
 }
 
 
-void Builtins::Generate_ParallelRecompile(MacroAssembler* masm) {
+void Builtins::Generate_ConcurrentRecompile(MacroAssembler* masm) {
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
@@ -125,7 +125,7 @@ void Builtins::Generate_ParallelRecompile(MacroAssembler* masm) {
     __ push(rcx);
 
     __ push(rdi);  // Function is also the parameter to the runtime call.
-    __ CallRuntime(Runtime::kParallelRecompile, 1);
+    __ CallRuntime(Runtime::kConcurrentRecompile, 1);
 
     // Restore call kind information.
     __ pop(rcx);