Replace HThrow with HCallRuntime.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 5c3fd709800fbfdab1eb25c18ee8a54f6a3d56c5..3c4d76f96ff10b25cbf4efebb0eb00ac9ac197c5 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1672,13 +1672,6 @@ LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoThrow(HThrow* instr) {
-  LOperand* context = UseFixed(instr->context(), rsi);
-  LOperand* value = UseFixed(instr->value(), rax);
-  return MarkAsCall(new(zone()) LThrow(context, value), instr);
-}
-
-
 LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) {
   return NULL;
 }