Allow HPushArgument to handle more than one argument.

src/lithium.cc

Index: src/lithium.cc
diff --git a/src/lithium.cc b/src/lithium.cc
index 0001e39840fa163f5b38bc693620a005360071c7..25d716d7460839d867544a242ab68e0673d28a60 100644
--- a/src/lithium.cc
+++ b/src/lithium.cc
@@ -509,7 +509,7 @@ LEnvironment* LChunkBuilderBase::CreateEnvironment(
 
     LOperand* op;
     HValue* value = hydrogen_env->values()->at(i);
-    CHECK(!value->IsPushArgument());  // Do not deopt outgoing arguments
+    CHECK(!value->IsPushArguments());  // Do not deopt outgoing arguments
     if (value->IsArgumentsObject() || value->IsCapturedObject()) {
       op = LEnvironment::materialization_marker();
     } else {
@@ -590,7 +590,7 @@ void LChunkBuilderBase::AddObjectToMaterialize(HValue* value,
       // Insert a hole for nested objects
       op = LEnvironment::materialization_marker();
     } else {
-      ASSERT(!arg_value->IsPushArgument());
+      ASSERT(!arg_value->IsPushArguments());
       // For ordinary values, tell the register allocator we need the value
       // to be alive here
       op = UseAny(arg_value);