CallIC and KeyedCallIC not wrapping this.

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index fdb22acea056ba3ed4581ca34ec1e9032bf11041..5934149f08b69e31cbf12fbe1d548f029a8770c2 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -2204,8 +2204,9 @@ MaybeObject* CallStubCompiler::CompileCallConstant(Object* object,
       break;
 
     case STRING_CHECK:
-      if (!function->IsBuiltin()) {
-        // Calling non-builtins with a value as receiver requires boxing.
+      if (!function->IsBuiltin() && !function_info->strict_mode()) {
+        // Calling non-strict non-builtins with a value as the receiver
+        // requires boxing.
         __ jmp(&miss);
       } else {
         // Check that the object is a string or a symbol.
@@ -2220,8 +2221,9 @@ MaybeObject* CallStubCompiler::CompileCallConstant(Object* object,
       break;
 
     case NUMBER_CHECK: {
-      if (!function->IsBuiltin()) {
-        // Calling non-builtins with a value as receiver requires boxing.
+      if (!function->IsBuiltin() && !function_info->strict_mode()) {
+        // Calling non-strict non-builtins with a value as the receiver
+        // requires boxing.
         __ jmp(&miss);
       } else {
         Label fast;
@@ -2241,8 +2243,9 @@ MaybeObject* CallStubCompiler::CompileCallConstant(Object* object,
     }
 
     case BOOLEAN_CHECK: {
-      if (!function->IsBuiltin()) {
-        // Calling non-builtins with a value as receiver requires boxing.
+      if (!function->IsBuiltin() && !function_info->strict_mode()) {
+        // Calling non-strict non-builtins with a value as the receiver
+        // requires boxing.
         __ jmp(&miss);
       } else {
         Label fast;