Turn on Sideload Warning UI (Windows only) to gather more data (leaving Sideload Wipeout off).

It looks like there might be a correlation between our features and the memory regression. This will hopefully tell us which feature is causing it.

BUG=163697
TEST=None
Review URL: https://codereview.chromium.org/11299344

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171093 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/feature_switch.cc

@@ -41,7 +41,11 @@ class CommonSwitches {
             FeatureSwitch::DEFAULT_DISABLED),
         prompt_for_external_extensions(
             switches::kPromptForExternalExtensions,
+#if defined(OS_WIN)
+            FeatureSwitch::DEFAULT_ENABLED),
+#else
             FeatureSwitch::DEFAULT_DISABLED),
+#endif
         tab_capture(
             switches::kTabCapture,
             FeatureSwitch::DEFAULT_ENABLED)