[stubs] Unify (and optimize) implementation of ToObject.

src/compiler/typer.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/compiler/typer.h"
 
 #include "src/base/flags.h"
 #include "src/base/lazy-instance.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/common-operator.h"
@@ skipping 1541 matching lines @@
     case Runtime::kInlineMathSqrt:
     case Runtime::kInlineMathAcos:
     case Runtime::kInlineMathAsin:
     case Runtime::kInlineMathAtan:
     case Runtime::kInlineMathAtan2:
       return Bounds(Type::None(zone()), Type::Number());
     case Runtime::kInlineMathClz32:
       return Bounds(Type::None(), Type::Range(0, 32, zone()));
     case Runtime::kInlineStringGetLength:
       return Bounds(Type::None(), Type::Range(0, String::kMaxLength, zone()));
+    case Runtime::kInlineToObject:
+      return Bounds(Type::None(), Type::Receiver());
     default:
       break;
   }
   return Bounds::Unbounded(zone());
 }
 
 
 Bounds Typer::Visitor::TypeJSForInNext(Node* node) {
   return Bounds(Type::None(zone()),
                 Type::Union(Type::Name(), Type::Undefined(), zone()));
@@ skipping 799 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8