Fix for cant reopen file dialog after close it by x button or alt+f4

chrome/browser/ui/views/extensions/extension_dialog.cc

Index: chrome/browser/ui/views/extensions/extension_dialog.cc
diff --git a/chrome/browser/ui/views/extensions/extension_dialog.cc b/chrome/browser/ui/views/extensions/extension_dialog.cc
index 32bc344759030129f11a4c160ccd3ff75e0db5aa..54b7d2b159cfbd1fa0a5cfbb86e5602b0115d557 100644
--- a/chrome/browser/ui/views/extensions/extension_dialog.cc
+++ b/chrome/browser/ui/views/extensions/extension_dialog.cc
@@ -113,9 +113,6 @@ void ExtensionDialog::Close() {
   if (!window_)
     return;
 
-  if (observer_)
-    observer_->ExtensionDialogIsClosing(this);
-
   window_->Close();
   window_ = NULL;
 }
@@ -139,6 +136,11 @@ string16 ExtensionDialog::GetWindowTitle() const {
   return window_title_;
 }
 
+void ExtensionDialog::WindowClosing() {
+  if (observer_)
+    observer_->ExtensionDialogIsClosing(this);
+}
+
 void ExtensionDialog::DeleteDelegate() {
   // The window has finished closing.  Allow ourself to be deleted.
   Release();