Make WebContentsDelegate::OpenColorChooser return NULL on failure

chrome/browser/ui/views/color_chooser_win.cc

Index: chrome/browser/ui/views/color_chooser_win.cc
diff --git a/chrome/browser/ui/views/color_chooser_win.cc b/chrome/browser/ui/views/color_chooser_win.cc
index ca4ae2c7c5c722b43789a7a169fd3e13c1901d49..0fde02044519c437faecdcc532a32175a611676b 100644
--- a/chrome/browser/ui/views/color_chooser_win.cc
+++ b/chrome/browser/ui/views/color_chooser_win.cc
@@ -52,8 +52,9 @@ ColorChooserWin* ColorChooserWin::current_color_chooser_ = NULL;
 
 ColorChooserWin* ColorChooserWin::Open(content::WebContents* web_contents,
                                        SkColor initial_color) {
-  if (!current_color_chooser_)
-    current_color_chooser_ = new ColorChooserWin(web_contents, initial_color);
+  if (current_color_chooser_)
+    return NULL;
+  current_color_chooser_ = new ColorChooserWin(web_contents, initial_color);
   return current_color_chooser_;
 }