Fix a crash due to uninitialized preference member in ProfileIOData

chrome/browser/prefetch/prefetch_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ skipping 24 matching lines @@
           switches::kForceFieldTrials,
           "Prefetch/ExperimentNo/");
     }
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     browser()->profile()->GetPrefs()->SetBoolean(
         prefs::kNetworkPredictionEnabled, do_predictive_networking_);
   }
 
-  bool RunPrefetchExperiment(bool expect_success) {
+  bool RunPrefetchExperiment(bool expect_success, Browser* browser) {
     CHECK(test_server()->Start());
     GURL url = test_server()->GetURL(kPrefetchPage);
 
     const base::string16 expected_title =
         expect_success ? base::ASCIIToUTF16("link onload")
                        : base::ASCIIToUTF16("link onerror");
     content::TitleWatcher title_watcher(
-        browser()->tab_strip_model()->GetActiveWebContents(), expected_title);
-    ui_test_utils::NavigateToURL(browser(), url);
-
+        browser->tab_strip_model()->GetActiveWebContents(), expected_title);
+    ui_test_utils::NavigateToURL(browser, url);
     return expected_title == title_watcher.WaitAndGetTitle();
   }
 
  private:
   bool do_predictive_networking_;
   bool do_prefetch_field_trial_;
 };
 
 class PrefetchBrowserTestPredictionOnExpOn : public PrefetchBrowserTestBase {
  public:
@@ skipping 14 matching lines @@
 };
 
 class PrefetchBrowserTestPredictionOffExpOff : public PrefetchBrowserTestBase {
  public:
   PrefetchBrowserTestPredictionOffExpOff()
       : PrefetchBrowserTestBase(false, false) {}
 };
 
 // Privacy option is on, experiment is on.  Prefetch should succeed.
 IN_PROC_BROWSER_TEST_F(PrefetchBrowserTestPredictionOnExpOn, PredOnExpOn) {
-  EXPECT_TRUE(RunPrefetchExperiment(true));
+  EXPECT_TRUE(RunPrefetchExperiment(true, browser()));
 }
 
 // Privacy option is on, experiment is off.  Prefetch should be dropped.
 IN_PROC_BROWSER_TEST_F(PrefetchBrowserTestPredictionOnExpOff, PredOnExpOff) {
-  EXPECT_TRUE(RunPrefetchExperiment(false));
+  EXPECT_TRUE(RunPrefetchExperiment(false, browser()));
 }
 
 // Privacy option is off, experiment is on.  Prefetch should be dropped.
 IN_PROC_BROWSER_TEST_F(PrefetchBrowserTestPredictionOffExpOn, PredOffExpOn) {
-  EXPECT_TRUE(RunPrefetchExperiment(false));
+  EXPECT_TRUE(RunPrefetchExperiment(false, browser()));
 }
 
 // Privacy option is off, experiment is off.  Prefetch should be dropped.
 IN_PROC_BROWSER_TEST_F(PrefetchBrowserTestPredictionOffExpOff, PredOffExpOff) {
-  EXPECT_TRUE(RunPrefetchExperiment(false));
+  EXPECT_TRUE(RunPrefetchExperiment(false, browser()));
+}
+
+// Bug 339909: When in incognito mode the browser crashed due to an
+// uninitialized preference member. Verify that it no longer does.
+IN_PROC_BROWSER_TEST_F(PrefetchBrowserTestPredictionOnExpOn, IncognitoTest) {
+  Profile* incognito_profile = browser()->profile()->GetOffTheRecordProfile();
+  Browser* incognito_browser = new Browser(
+      Browser::CreateParams(incognito_profile, browser()->host_desktop_type()));
+
+  // Navigate just to have a tab in this window, otherwise there is no
+  // WebContents for the incognito browser.
+  ui_test_utils::OpenURLOffTheRecord(browser()->profile(), GURL("about:blank"));
+
+  EXPECT_TRUE(RunPrefetchExperiment(true, incognito_browser));
 }
 
 }  // namespace