Force MimeHandlerView to always use BrowserPlugin

content/public/common/browser_plugin_guest_mode.h

 // Copyright 2015 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_COMMON_BROWSER_PLUGIN_GUEST_MODE_H_
 #define CONTENT_PUBLIC_COMMON_BROWSER_PLUGIN_GUEST_MODE_H_
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
+class WebContents;
+
 class CONTENT_EXPORT BrowserPluginGuestMode {
  public:
   // Returns true if inner WebContents should be implemented in terms of cross-
   // process iframes.
   static bool UseCrossProcessFramesForGuests();
 
+  // TODO(ekaramad): Remove the following method once MimeHandlerViewGuest uses
+  // OOPIF (https://crbug.com/563285).
+  // Returns true if the given |web_contents| is implemented in terms of
+  // cross-process iframes.
+  static bool UseCrossProcessFramesForWebContents(WebContents* web_contents);
+
  private:
   BrowserPluginGuestMode();  // Not instantiable
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuestMode);
 };
 
 }  // namespace
 
 #endif  // CONTENT_PUBLIC_COMMON_BROWSER_PLUGIN_GUEST_MODE_H_