Print Preview: Display a throbber when the user requests the system print

chrome/browser/printing/print_view_manager_observer.h

Index: chrome/browser/printing/print_view_manager_observer.h
diff --git a/chrome/browser/printing/print_view_manager_observer.h b/chrome/browser/printing/print_view_manager_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..25a4c5bd553dcce9a9b1eca40c0606d9a73d6a6e
--- /dev/null
+++ b/chrome/browser/printing/print_view_manager_observer.h
@@ -0,0 +1,24 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_OBSERVER_H_
+#define CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_OBSERVER_H_
+#pragma once
+
+namespace printing {
+
+// An interface the PrintViewManager uses to notify an observer when the print
+// dialog is shown. Register the observer via PrintViewManager::SetObserver.

[Lei Zhang, 2011/06/28 09:15:38]

s/SetObserver/set_observer/

[James Hawkins, 2011/06/28 18:15:36]

Done.

+class PrintViewManagerObserver {
+ public:
+  // Notifies the observer that the print dialog was shown.
+  virtual void OnPrintDialogShown() = 0;
+
+ protected:
+  virtual ~PrintViewManagerObserver() {}
+};
+
+}  // namespace printing
+
+#endif  // CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_OBSERVER_H_