Revert "Enable chrome.automation.getDesktop on all aura platforms."

chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js

Index: chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js
diff --git a/chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js b/chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js
index 90e1711b2ef0422bf505be8f7aa01e1f659b12bb..a2f61c97ec70cec9bc8774bb1d8c3e8888ec4c18 100644
--- a/chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js
+++ b/chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js
@@ -22,14 +22,28 @@ var allTests = [
   function testLoadTabs() {
     var webViews = getAllWebViews();
     assertEq(2, webViews.length);
-    var subroot = webViews[1].firstChild;
-    assertEq(webViews[1], subroot.parent);
-    assertEq(subroot, subroot.parent.children[0]);
-    var button = subroot.firstChild.firstChild;
-    assertEq(chrome.automation.RoleType.button, button.role);
-    var input = subroot.firstChild.lastChild.previousSibling;
-    assertEq(chrome.automation.RoleType.textField, input.role);
-    chrome.test.succeed();
+
+    // Test spins up more quickly than the load; listen for the childrenChanged
+    // event.
+    function childrenChangedListener(evt) {
+      var subroot = webViews[1].firstChild;
+      assertEq(evt.target, subroot.parent);
+      assertEq(subroot, subroot.parent.children[0]);
+
+      var button = subroot.firstChild.firstChild;
+      assertEq(chrome.automation.RoleType.button, button.role);
+
+      var input = subroot.firstChild.lastChild.previousSibling;
+      assertEq(chrome.automation.RoleType.textField, input.role);
+      webViews[1].removeEventListener(
+          chrome.automation.EventType.childrenChanged,
+          childrenChangedListener), true;
+      chrome.test.succeed();
+    }
+    webViews[1].addEventListener(
+        chrome.automation.EventType.childrenChanged,
+        childrenChangedListener,
+        true);
   },
 
   function testSubevents() {