Remove all calls to domAutomationController.setAutomationId.

These calls are no longer needed after r485461
(https://crrev.com/2478803003) which has made the
domAutomationController.setAutomationId call a no-op.

BUG=662543
This CL was uploaded by git cl split.

R=agl@chromium.org

Review-Url: https://codereview.chromium.org/2975983002
Cr-Commit-Position: refs/heads/master@{#487649}

chrome/browser/ssl/ssl_browser_tests.cc

@@ -2414,7 +2414,6 @@ IN_PROC_BROWSER_TEST_F(SSLUITestWaitForDOMNotification,
   ASSERT_TRUE(content::ExecuteScript(
       tab,
       "var loaded = function () {"
-      "  window.domAutomationController.setAutomationId(0);"
       "  window.domAutomationController.send('mixed-image-loaded');"
       "};"
       "var img = document.createElement('img');"