Crankshaft support for StringCharFromCode.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index c5b0c1dfae9c209507cfba7059a532f67cbd86a1..ce9d0928cfb2c7fdd88b04b4dd19e3d8d2a770a3 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1893,6 +1893,13 @@ LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
+  LOperand* char_code = UseRegister(instr->value());
+  LStringCharFromCode* result = new LStringCharFromCode(char_code);
+  return AssignPointerMap(DefineAsRegister(result));
+}
+
+
 LInstruction* LChunkBuilder::DoStringLength(HStringLength* instr) {
   LOperand* string = UseRegisterAtStart(instr->value());
   return DefineAsRegister(new LStringLength(string));