Converted download UI tests to Browser tests.

chrome/test/in_process_browser_test.cc

Index: chrome/test/in_process_browser_test.cc
diff --git a/chrome/test/in_process_browser_test.cc b/chrome/test/in_process_browser_test.cc
index 24f91791840f9c7f2b5dd4ba6d319b1fee6e00c7..6d6e1cadf6be9c9b79dae59410e519085f4f4eac 100644
--- a/chrome/test/in_process_browser_test.cc
+++ b/chrome/test/in_process_browser_test.cc
@@ -279,6 +279,14 @@ Browser* InProcessBrowserTest::CreateBrowser(Profile* profile) {
   return browser;
 }
 
+Browser* InProcessBrowserTest::CreateIncognitoBrowser() {
+  // Create a new browser with using the incognito profile.
+  Browser* incognito =
+      Browser::Create(browser()->profile()->GetOffTheRecordProfile());
+  InitializeBrowser(incognito);
+  return incognito;
+}
+
 Browser* InProcessBrowserTest::CreateBrowserForPopup(Profile* profile) {
   Browser* browser = Browser::CreateForType(Browser::TYPE_POPUP, profile);
   InitializeBrowser(browser);