Show user data dialog earlier on Windows.

chrome/browser/chrome_main_browsertest.cc

Index: chrome/browser/chrome_main_browsertest.cc
diff --git a/chrome/browser/chrome_main_browsertest.cc b/chrome/browser/chrome_main_browsertest.cc
index c194e55f258489fa1dfb8516166ec7a44959462f..6aba1615510c14f39a17e2468d4b723556f30a56 100644
--- a/chrome/browser/chrome_main_browsertest.cc
+++ b/chrome/browser/chrome_main_browsertest.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/user_data_dir_dialog.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
@@ -136,3 +137,47 @@ IN_PROC_BROWSER_TEST_F(ChromeMainTest, SecondLaunchFromIncognitoWithNormalUrl) {
 }
 
 #endif  // !OS_MACOSX
+
+// These tests only apply to the Windows version; see chrome_browser_main.cc:
+// function GetUserDataDir() for details.
+#if defined(OS_WIN)
+class ChromeMainUserDataDirTest : public InProcessBrowserTest {
+ public:
+  ChromeMainUserDataDirTest(): callback_invoked_(false) {}
+
+  bool is_callback_invoked() { return callback_invoked_; }
+  void ShowUserDataDirDialog() {
+    // Set callback invoked flag and restore the correct user data dir.
+    callback_invoked_ = true;
+    PathService::Override(chrome::DIR_USER_DATA, user_data_dir_);
+  }
+
+ protected:
+  base::FilePath user_data_dir_;
+  bool callback_invoked_;
+
+  virtual void SetUp() OVERRIDE {
+    InProcessBrowserTest::SetUp();
+
+    // Save the actual user data dir.
+    PathService::Get(chrome::DIR_USER_DATA, &user_data_dir_);
+
+    // Override user data dir to a bogus value. Make sure to set |create| flag
+    // to false so that PathService::OverrideAndCreateIfNeeded does not create
+    // a folder at this path.
+    base::FilePath bogus_user_data_dir("/bogus/should/not/exist");
+    PathService::OverrideAndCreateIfNeeded(chrome::DIR_USER_DATA,
+                                           bogus_user_data_dir,
+                                           false);
+
+    // Install custom ShowUserDataDirDialog callback.
+    chrome::InstallCustomShowUserDataDirDialogCallbackForTest(
+        base::Bind(&ChromeMainUserDataDirTest::ShowUserDataDirDialog, this));
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(ChromeMainUserDataDirTest, BogusUserDataDir) {
+  // The ShowUserDataDirDialog should have been invoked and we did not crash.
+  ASSERT_TRUE(is_callback_invoked());
+}
+#endif  // OS_WIN