Check still could be useful if code compiled without full printing.

>> Removed Ctrl+Shift+P shortcut for system dialog printing on Windows.
>>    BUG=374321
>>    Review URL: https://codereview.chromium.org/522493002
TBR=thestig@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/551773002

Cr-Commit-Position: refs/heads/master@{#293752}

chrome/browser/ui/browser_commands.cc

@@ -892,6 +892,15 @@ void BasicPrint(Browser* browser) {
 }
 
 bool CanBasicPrint(Browser* browser) {
+  // If printing is not disabled via pref or policy, it is always possible to
+  // advanced print when the print preview is visible.  The exception to this
+  // is under Win8 ash, since showing the advanced print dialog will open it
+  // modally on the Desktop and hang the browser.
+#if defined(OS_WIN)
+  if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH)
+    return false;
+#endif
+
   return browser->profile()->GetPrefs()->GetBoolean(prefs::kPrintingEnabled) &&
       (PrintPreviewShowing(browser) || CanPrint(browser));
 }