Add scoped path overrides for system directories for ExtensionBrowserTests.

chrome/browser/extensions/extension_browsertest.cc

Index: chrome/browser/extensions/extension_browsertest.cc
diff --git a/chrome/browser/extensions/extension_browsertest.cc b/chrome/browser/extensions/extension_browsertest.cc
index 5f888bf6f371170f4dacca4d18a728b4f162f381..7ac88659f6712afb9b4873a6822b56b6d2208a95 100644
--- a/chrome/browser/extensions/extension_browsertest.cc
+++ b/chrome/browser/extensions/extension_browsertest.cc
@@ -69,6 +69,13 @@ ExtensionBrowserTest::ExtensionBrowserTest()
       override_prompt_for_external_extensions_(
           FeatureSwitch::prompt_for_external_extensions(),
           false),
+#if defined(OS_WIN)
+      user_desktop_override_(base::DIR_USER_DESKTOP),
+      common_desktop_override_(base::DIR_COMMON_DESKTOP),
+      user_quick_launch_override_(base::DIR_USER_QUICK_LAUNCH),
+      start_menu_override_(base::DIR_START_MENU),
+      common_start_menu_override_(base::DIR_COMMON_START_MENU),
+#endif
       profile_(NULL) {
   EXPECT_TRUE(temp_dir_.CreateUniqueTempDir());
 }