[heap profiler] Use internal type links for bound this and target function.

test/cctest/test-heap-profiler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 238 matching lines @@
   const v8::HeapGraphNode* f =
       GetProperty(global, v8::HeapGraphEdge::kProperty, "boundFunction");
   CHECK(f);
   CHECK(v8_str("native_bind")->Equals(env.local(), f->GetName()).FromJust());
   const v8::HeapGraphNode* bindings =
       GetProperty(f, v8::HeapGraphEdge::kInternal, "bindings");
   CHECK(bindings);
   CHECK_EQ(v8::HeapGraphNode::kArray, bindings->GetType());
   CHECK_EQ(1, bindings->GetChildrenCount());
 
-  const v8::HeapGraphNode* bound_this = GetProperty(
-      f, v8::HeapGraphEdge::kShortcut, "bound_this");
+  const v8::HeapGraphNode* bound_this =
+      GetProperty(f, v8::HeapGraphEdge::kInternal, "bound_this");
   CHECK(bound_this);
   CHECK_EQ(v8::HeapGraphNode::kObject, bound_this->GetType());
 
-  const v8::HeapGraphNode* bound_function = GetProperty(
-      f, v8::HeapGraphEdge::kShortcut, "bound_function");
+  const v8::HeapGraphNode* bound_function =
+      GetProperty(f, v8::HeapGraphEdge::kInternal, "bound_function");
   CHECK(bound_function);
   CHECK_EQ(v8::HeapGraphNode::kClosure, bound_function->GetType());
 
   const v8::HeapGraphNode* bound_argument = GetProperty(
       f, v8::HeapGraphEdge::kShortcut, "bound_argument_1");
   CHECK(bound_argument);
   CHECK_EQ(v8::HeapGraphNode::kObject, bound_argument->GetType());
 }
 
 
@@ skipping 2774 matching lines @@
       "      a[i] = i;\n"
       "  for (var i = 0; i < 3; ++i)\n"
       "      a.shift();\n"
       "}\n");
 
   CcTest::heap()->CollectGarbage(v8::internal::NEW_SPACE);
   // Should not crash.
 
   heap_profiler->StopSamplingHeapProfiler();
 }