Mac: the return of the tab-modal-sheets patch.

chrome/browser/login_prompt_mac.mm

Index: chrome/browser/login_prompt_mac.mm
diff --git a/chrome/browser/login_prompt_mac.mm b/chrome/browser/login_prompt_mac.mm
index 7446aa2e4958daf26be49a44ddcbf1729b2b76f0..d34effc37c294a92e4d716bd7e224a7cbe4be7b5 100644
--- a/chrome/browser/login_prompt_mac.mm
+++ b/chrome/browser/login_prompt_mac.mm
@@ -80,6 +80,21 @@ class LoginHandlerMac : public LoginHandler,
                                            std::wstring explanation) {
     DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
 
+    // TODO(viettrungluu): Is this still necessary with thakis's queuing? Let's
+    // hypothesize "no", but I need to check this....
+#if 0
+    TabContents* requesting_contents = GetTabContentsForLogin();
+    DCHECK(requesting_contents);
+
+    // If something goes wrong (e.g., there's already a tab-modal sheet up),
+    // cancel the authorization.
+    if (!requesting_contents ||
+        !requesting_contents->CanCreateConstrainedDialog()) {
+      CancelAuth();
+      return;
+    }
+#endif
+
     // Load nib here instead of in constructor.
     sheet_controller_ = [[[LoginHandlerSheet alloc]
         initWithLoginHandler:this] autorelease];