Allow HPushArgument to handle more than one argument.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 4e3f561777a095ec7bf027b08b52ff52bdd126f4..6c13443b4e2375da6b4e52c658a112d4d9213850 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1060,9 +1060,13 @@ LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
-  LOperand* argument = UseAny(instr->argument());
-  return new(zone()) LPushArgument(argument);
+LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) {
+  int argc = instr->OperandCount();
+  for (int i = 0; i < argc; ++i) {
+    LOperand* argument = UseAny(instr->argument(i));
+    AddInstruction(new(zone()) LPushArgument(argument), instr);
+  }
+  return NULL;
 }