Add human readable programmatic enum name/values to chrome.automation.

chrome/test/data/extensions/api_test/automation/tests/tabs/sanity_check.js

Index: chrome/test/data/extensions/api_test/automation/tests/tabs/sanity_check.js
diff --git a/chrome/test/data/extensions/api_test/automation/tests/tabs/sanity_check.js b/chrome/test/data/extensions/api_test/automation/tests/tabs/sanity_check.js
index b391c97c4b4d66251cb7c184f1936b12241b8a0a..ff4ee3b584c85ff161913da34c2af70d912a01ae 100644
--- a/chrome/test/data/extensions/api_test/automation/tests/tabs/sanity_check.js
+++ b/chrome/test/data/extensions/api_test/automation/tests/tabs/sanity_check.js
@@ -5,14 +5,14 @@
 // Do not test orientation or hover attributes (similar to exclusions on native
 // accessibility), since they can be inconsistent depending on the environment.
 var RemoveUntestedStates = function(state) {
-  delete state['horizontal'];
-  delete state['hovered'];
-  delete state['vertical'];
+  delete state[StateType.horizontal];
+  delete state[StateType.hovered];
+  delete state[StateType.vertical];
 };
 
 var allTests = [
   function testSimplePage() {
-    var title = tree.root.attributes['docTitle'];
+    var title = tree.root.attributes.docTitle;
     assertEq('Automation Tests', title);
     RemoveUntestedStates(tree.root.state);
     assertEq(
@@ -22,7 +22,7 @@ var allTests = [
     assertEq(1, children.length);
 
     var body = children[0];
-    assertEq('body', body.attributes['htmlTag']);
+    assertEq('body', body.attributes.htmlTag);
 
     RemoveUntestedStates(body.state);
     assertEq({enabled: true, readOnly: true},
@@ -31,19 +31,19 @@ var allTests = [
     var contentChildren = body.children();
     assertEq(3, contentChildren.length);
     var okButton = contentChildren[0];
-    assertEq('Ok', okButton.attributes['name']);
+    assertEq('Ok', okButton.attributes.name);
     RemoveUntestedStates(okButton.state);
     assertEq({enabled: true, focusable: true, readOnly: true},
              okButton.state);
     var userNameInput = contentChildren[1];
     assertEq('Username',
-             userNameInput.attributes['description']);
+             userNameInput.attributes.description);
     RemoveUntestedStates(userNameInput.state);
     assertEq({enabled: true, focusable: true},
              userNameInput.state);
     var cancelButton = contentChildren[2];
     assertEq('Cancel',
-             cancelButton.attributes['name']);
+             cancelButton.attributes.name);
     RemoveUntestedStates(cancelButton.state);
     assertEq({enabled: true, focusable: true, readOnly: true},
              cancelButton.state);