Replace screen capture confirmation infobar with a message box.

chrome/browser/ui/screen_capture_confirmation_ui.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 CHROME_BROWSER_UI_SCREEN_CAPTURE_CONFIRMATION_UI_H_
+#define CHROME_BROWSER_UI_SCREEN_CAPTURE_CONFIRMATION_UI_H_
+
+#include "base/callback.h"
+#include "base/string16.h"
+
+// Interface for screen capture confirmation UI to get user consent before
+// starting screen capturing.
+class ScreenCaptureConfirmationUI {
+ public:
+  enum Result {
+    ALLOW,
+    DENY,
+  };
+
+  typedef base::Callback<void(Result result)> ResultCallback;
+
+  virtual ~ScreenCaptureConfirmationUI() {}
+
+  // Shows the screen capture confirmation prompt. |result_callback| will be
+  // invoked when the user chooses to stop capturing. |title| specifies the
+  // title of the application that requested screen capture. Returns false if
+  // the prompt cannot be shown for any reason (|result_callback| is ignored in
+  // that case).
+  virtual bool Show(const ResultCallback& result_callback,
+                    const string16& title) = 0;
+};
+
+#endif  // CHROME_BROWSER_UI_SCREEN_CAPTURE_CONFIRMATION_UI_H_