Web Inspector: Move meta node out of nodes in snapshot serialization.

Web Inspector: Move meta node out of nodes in snapshot serialization.
https://bugs.webkit.org/show_bug.cgi?id=83701

Patch by Alexei Filippov <alexeif@chromium.org> on 2012-04-12
Reviewed by Yury Semikhatsky.

Source/WebCore:

* inspector/front-end/HeapSnapshot.js:
(WebInspector.HeapSnapshotLoader.prototype.pushJSONChunk):
(WebInspector.HeapSnapshot):

LayoutTests:

* inspector/profiler/heap-snapshot-test.js:
(initialize_HeapSnapshotTest.InspectorTest.createHeapSnapshotSplitNodesEdgesMockRaw):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113988 268f45cc-cd09-0410-ab3c-d52691b4dbfc