Tests history saving logic in TabbedEditorContainer.

Bug 76912
  history = []
  history = [{"url":"url_1"}]
  history = [{"url":"url_2"},{"url":"url_1"}]
  history = [{"url":"url_3"},{"url":"url_2"},{"url":"url_1"}]
  history = [{"url":"url_2"},{"url":"url_3"},{"url":"url_1"}]
  history = [{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_11"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_12"},{"url":"url_11"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_13"},{"url":"url_12"},{"url":"url_11"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_12"},{"url":"url_13"},{"url":"url_11"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_11"},{"url":"url_12"},{"url":"url_13"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_11","selectionRange":{"startLine":15,"startColumn":5,"endLine":15,"endColumn":10},"scrollLineNumber":10},{"url":"url_12"},{"url":"url_13"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_12"},{"url":"url_13"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_14"},{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_15"},{"url":"url_14"},{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_16"},{"url":"url_15"},{"url":"url_14"},{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_15"},{"url":"url_14"},{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_14"},{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_12"},{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_1"},{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_2"},{"url":"url_3"}]
  history = [{"url":"url_3"}]
  history = []