Rename "parallel recompilation" to "concurrent recompilation".

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index 3d2f1c0fa7668a61faee42a18ba2cca9162a624d..aceb9e0e0b2d0bc31103c92a49314a70b68c446a 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -87,7 +87,7 @@ namespace internal {
   F(NewStrictArgumentsFast, 3, 1) \
   F(LazyCompile, 1, 1) \
   F(LazyRecompile, 1, 1) \
-  F(ParallelRecompile, 1, 1) \
+  F(ConcurrentRecompile, 1, 1) \
   F(InstallRecompiledCode, 1, 1) \
   F(NotifyDeoptimized, 1, 1) \
   F(NotifyStubFailure, 0, 1) \
@@ -95,7 +95,7 @@ namespace internal {
   F(DeoptimizeFunction, 1, 1) \
   F(ClearFunctionTypeFeedback, 1, 1) \
   F(RunningInSimulator, 0, 1) \
-  F(IsParallelRecompilationSupported, 0, 1) \
+  F(IsConcurrentRecompilationSupported, 0, 1) \
   F(OptimizeFunctionOnNextCall, -1, 1) \
   F(NeverOptimizeFunction, 1, 1) \
   F(GetOptimizationStatus, -1, 1) \