Mark weak fields of JSArrayBuffer and JSArrayBufferView as weak in heap snapshot.

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 2301 matching lines @@
 
     AllocationTraceNode* node =
         FindNode(tracker, Vector<const char*>(names, ARRAY_SIZE(names)));
     CHECK_NE(NULL, node);
     CHECK_LT(node->allocation_count(), 100);
 
     CcTest::heap()->DisableInlineAllocation();
     heap_profiler->StopTrackingHeapObjects();
   }
 }
+
+
+TEST(ArrayBufferAndArrayBufferView) {
+  LocalContext env;
+  v8::HandleScope scope(env->GetIsolate());
+  v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
+  CompileRun("arr1 = new Uint32Array(100);\n");
+  const v8::HeapSnapshot* snapshot =
+      heap_profiler->TakeHeapSnapshot(v8_str("snapshot"));
+  CHECK(ValidateSnapshot(snapshot));
+  const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
+  const v8::HeapGraphNode* arr1_obj =
+      GetProperty(global, v8::HeapGraphEdge::kProperty, "arr1");
+  CHECK_NE(NULL, arr1_obj);
+  const v8::HeapGraphNode* arr1_buffer =
+      GetProperty(arr1_obj, v8::HeapGraphEdge::kInternal, "buffer");
+  CHECK_NE(NULL, arr1_buffer);
+  const v8::HeapGraphNode* first_view =
+      GetProperty(arr1_buffer, v8::HeapGraphEdge::kWeak, "2");
+  CHECK_NE(NULL, first_view);
+}