remove SignatureInfo class

src/ic/call-optimization.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/ic/call-optimization.h"
 
 
 namespace v8 {
@@ skipping 74 matching lines @@
   AnalyzePossibleApiFunction(function);
 }
 
 
 void CallOptimization::AnalyzePossibleApiFunction(Handle<JSFunction> function) {
   if (!function->shared()->IsApiFunction()) return;
   Handle<FunctionTemplateInfo> info(function->shared()->get_api_func_data());
 
   // Require a C++ callback.
   if (info->call_code()->IsUndefined()) return;
-  api_call_info_ =
-      Handle<CallHandlerInfo>(CallHandlerInfo::cast(info->call_code()));
+  api_call_info_ = handle(CallHandlerInfo::cast(info->call_code()));
 
-  // Accept signatures that either have no restrictions at all or
-  // only have restrictions on the receiver.
   if (!info->signature()->IsUndefined()) {
-    Handle<SignatureInfo> signature =
-        Handle<SignatureInfo>(SignatureInfo::cast(info->signature()));
-    if (!signature->args()->IsUndefined()) return;
-    if (!signature->receiver()->IsUndefined()) {
-      expected_receiver_type_ = Handle<FunctionTemplateInfo>(
-          FunctionTemplateInfo::cast(signature->receiver()));
-    }
+    expected_receiver_type_ =
+        handle(FunctionTemplateInfo::cast(info->signature()));
   }
 
   is_simple_api_call_ = true;
 }
 }
 }  // namespace v8::internal