[turbofan] Use builtin inlining mechanism for Math.abs and Math.sqrt.

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index 317421f4ee2c0a93ffe48be7c0b34b6802e224c4..ebe2e4e72330e8101e546d6cef0ca3c1ce25397c 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -42,6 +42,8 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
       return ReduceInlineIsInstanceType(node, JS_REGEXP_TYPE);
     case Runtime::kInlineMathFloor:
       return ReduceInlineMathFloor(node);
+    case Runtime::kInlineMathSqrt:
+      return ReduceInlineMathSqrt(node);
     case Runtime::kInlineValueOf:
       return ReduceInlineValueOf(node);
     default:
@@ -170,6 +172,11 @@ Reduction JSIntrinsicLowering::ReduceInlineMathFloor(Node* node) {
 }
 
 
+Reduction JSIntrinsicLowering::ReduceInlineMathSqrt(Node* node) {
+  return Change(node, machine()->Float64Sqrt());
+}
+
+
 Reduction JSIntrinsicLowering::ReduceInlineValueOf(Node* node) {
   // if (%_IsSmi(value)) {
   //   return value;