Tests for CL 647933003.

BUG=424453

Review URL: https://codereview.chromium.org/653283007

Cr-Commit-Position: refs/heads/master@{#302374}
  bool ScreenOrientationSupported() {
    bool support;
    ExecuteScriptAndGetValue(shell()->web_contents()->GetMainFrame(),
                             "'orientation' in screen")->GetAsBoolean(&support);
    return support;
  }

  bool ScreenOrientationSupported() {
    bool support;
    ExecuteScriptAndGetValue(shell()->web_contents()->GetMainFrame(),
                             "'orientation' in screen")->GetAsBoolean(&support);
    return support;
  }
