Force MimeHandlerView to always use BrowserPlugin

content/public/browser/guest_mode.h

Index: content/public/browser/guest_mode.h
diff --git a/content/public/browser/guest_mode.h b/content/public/browser/guest_mode.h
new file mode 100644
index 0000000000000000000000000000000000000000..de1a20ffe256ae631708069b0f4dff03f8fd3612
--- /dev/null
+++ b/content/public/browser/guest_mode.h
@@ -0,0 +1,27 @@
+// Copyright 2016 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 CONTENT_PUBLIC_BROWSER_GUEST_MODE_H_
+#define CONTENT_PUBLIC_BROWSER_GUEST_MODE_H_
+
+#include "base/macros.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class WebContents;
+
+namespace guest_mode {
+
+// TODO(ekaramad): This method is temporarily added to provide a workaround to

[Charlie Reis, 2016/09/15 20:56:10]

If we do end up removing UseCrossProcessFramesForGuests for the browser process,
we should add an explanatory comment like "Returns whether the given inner
WebContents should be implemented using out-of-process iframes instead of
BrowserPlugin" in addition to having the TODO.

[EhsanK, 2016/09/21 21:34:53]

Acknowledged.

+// allow existence of some guests based on BrowserPlugin in scenarios where the
+// other guests use out of process <iframe>s. It will be removed once the issue
+// https://crbug.com/642826 is resolved.
+bool CONTENT_EXPORT IsCrossProcessFrameGuest(WebContents* web_contents);
+
+}  // namespace guest_mode
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_GUEST_MODE_H_