[Extensions UI] Use developerPrivate API for profile configuration

chrome/browser/ui/webui/extensions/extension_settings_browsertest.js

Index: chrome/browser/ui/webui/extensions/extension_settings_browsertest.js
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_browsertest.js b/chrome/browser/ui/webui/extensions/extension_settings_browsertest.js
index ef1ff39d7d718b8692b76b2b6755d64ee0476ea1..f96ed80fa3bb9b4052bf16d6ba11236aab89829d 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_browsertest.js
+++ b/chrome/browser/ui/webui/extensions/extension_settings_browsertest.js
@@ -119,6 +119,18 @@ BasicExtensionSettingsWebUITest.prototype = {
       });
     });
   },
+
+  /** @protected */
+  verifyDeveloperModeWorks: function() {
+    var extensionSettings = getRequiredElement('extension-settings');
+    assertFalse(extensionSettings.classList.contains('dev-mode'));
+    $('toggle-dev-on').click();
+    assertTrue(extensionSettings.classList.contains('dev-mode'));
+    chrome.developerPrivate.getProfileConfiguration(function(profileInfo) {
+      assertTrue(profileInfo.inDeveloperMode);
+      this.nextStep();
+    }.bind(this));
+  },
 };
 
 TEST_F('BasicExtensionSettingsWebUITest', 'testDisable', function() {
@@ -143,6 +155,21 @@ TEST_F('BasicExtensionSettingsWebUITest', 'testUninstall', function() {
   this.nextStep();
 });
 
+TEST_F('BasicExtensionSettingsWebUITest', 'testDeveloperMode', function() {
+  var next = this.nextStep.bind(this);
+  var checkDevModeIsOff = function() {
+    chrome.developerPrivate.getProfileConfiguration(function(profileInfo) {
+      assertFalse(profileInfo.inDeveloperMode);
+      next();
+    });
+  };
+  this.steps = [checkDevModeIsOff,
+                this.waitForPageLoad,
+                this.verifyDeveloperModeWorks,
+                testDone];
+  this.nextStep();
+});
+
 function AsyncExtensionSettingsWebUITest() {}
 
 AsyncExtensionSettingsWebUITest.prototype = {