Move some code from Runtime_GetPrototype into a new Object::GetPrototype.

src/objects.h

 // Copyright 2012 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1272 matching lines @@
       Handle<Object> value);
 
   MUST_USE_RESULT static inline MaybeHandle<Object> GetElement(
       Isolate* isolate, Handle<Object> object, uint32_t index,
       LanguageMode language_mode = SLOPPY);
 
   MUST_USE_RESULT static inline MaybeHandle<Object> SetElement(
       Isolate* isolate, Handle<Object> object, uint32_t index,
       Handle<Object> value, LanguageMode language_mode);
 
-  static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
-      Isolate* isolate, Handle<Object> receiver);
+  // Get the first non-hidden prototype.
+  static inline Handle<Object> GetPrototype(Isolate* isolate,
+                                            Handle<Object> receiver);
 
   bool HasInPrototypeChain(Isolate* isolate, Object* object);
 
   // Returns the permanent hash code associated with this object. May return
   // undefined if not yet created.
   Object* GetHash();
 
   // Returns undefined for JSObjects, but returns the hash code for simple
   // objects.  This avoids a double lookup in the cases where we know we will
   // add the hash to the JSObject if it does not already exist.
@@ skipping 9480 matching lines @@
   // (elements + properties) in the current level.
   int levelLength_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyAccumulator);
 };
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_