Make certificate viewer non-modal using BaseShellDialog to fix aura painting

ui/shell_dialogs/certificate_viewer_dialog_win.h

+// Copyright 2013 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 UI_SHELL_DIALOGS_CERTIFICATE_VIEWER_DIALOG_WIN_H_
+#define UI_SHELL_DIALOGS_CERTIFICATE_VIEWER_DIALOG_WIN_H_
+
+#include <windows.h>
+#include <cryptuiapi.h>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "base/message_loop/message_loop_proxy.h"
+#include "ui/shell_dialogs/base_shell_dialog_win.h"
+#include "ui/shell_dialogs/shell_dialogs_export.h"
+
+namespace net {
+class X509Certificate;
+}
+
+namespace ui {
+
+// A thin wrapper around the native certificate viewer dialog that uses
+// BaseShellDialog to have the dialog run on a background thread.
+class SHELL_DIALOGS_EXPORT CertificateViewerDialogWin

[sky, 2013/11/05 22:34:03]

Document why this runs on a background thread.

[scottmg, 2013/11/05 23:40:33]

Done, and updated CL description.

+    : public BaseShellDialogImpl {
+ public:
+  // Called to open the certificate dialog on a background thread.
+  // |owning_window| is the parent HWND, and |certificate| is the certificate
+  // to be displayed.
+  static void Show(HWND owning_window, net::X509Certificate* certificate);

[sky, 2013/11/05 22:34:03]

Can this take a const net::X509C& ?

[scottmg, 2013/11/05 23:40:33]

Done.

+
+ private:
+  CertificateViewerDialogWin(HWND owning_window,
+                             net::X509Certificate* certificate);
+
+  // A struct for holding all the state necessary for displaying the
+  // certificate viewer dialog.
+  struct ExecuteCertificateViewerParams {
+    ExecuteCertificateViewerParams(RunState run_state,
+                                   HWND owner,
+                                   PCCERT_CONTEXT cert_list)
+        : run_state(run_state),
+          owner(owner),
+          cert_list(cert_list),
+          ui_proxy(base::MessageLoopForUI::current()->message_loop_proxy()) {}
+
+    RunState run_state;
+    HWND owner;
+    PCCERT_CONTEXT cert_list;

[sky, 2013/11/05 22:34:03]

Does this need to be freed? And is this tied to the life of the cerificate
passed in?

[scottmg, 2013/11/05 23:40:33]

Yes, it does. It's freed in CertificateViewerCompleted which is back on the main
thread.

I don't believe it's tied to the lifetime of the cert that's passed in (my
understanding is that it copies the data into the new one), but maybe Ryan can
comment on that.

[Ryan Sleevi, 2013/11/06 22:47:50]

Correct, it copies into a new one, since the dialog may mutate the object.

+    scoped_refptr<base::MessageLoopProxy> ui_proxy;
+  };
+
+  // Runs the certificate viewer dialog. Should be run on the the
+  // BaseShellDialogImpl thread. Posts back to CertificateViewerCompleted on
+  // the UI thread on completion.
+  void ExecuteCertificateViewer(const ExecuteCertificateViewerParams& params);
+
+  // Handler for the result of the certificate viewer dialog. Should be run on
+  // the UI thread.
+  void CertificateViewerCompleted(const ExecuteCertificateViewerParams& params);
+
+  DISALLOW_COPY_AND_ASSIGN(CertificateViewerDialogWin);
+};
+
+}  // namespace ui
+
+#endif  // UI_SHELL_DIALOGS_CERTIFICATE_VIEWER_DIALOG_WIN_H_