Force MimeHandlerView to always use BrowserPlugin

content/browser/browser_plugin/browser_plugin_guest.h

Index: content/browser/browser_plugin/browser_plugin_guest.h
diff --git a/content/browser/browser_plugin/browser_plugin_guest.h b/content/browser/browser_plugin/browser_plugin_guest.h
index ccfb0b990d3b2ee748ae053495a6f266f796ef71..242e231bdabf49934c7191feb51ec113241d0957 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.h
+++ b/content/browser/browser_plugin/browser_plugin_guest.h
@@ -33,6 +33,7 @@
 #include "content/common/input/input_event_ack_state.h"
 #include "content/public/browser/browser_plugin_guest_delegate.h"
 #include "content/public/browser/guest_host.h"
+#include "content/public/browser/guest_mode.h"
 #include "content/public/browser/readback_types.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "third_party/WebKit/public/platform/WebDragOperation.h"
@@ -253,6 +254,11 @@ class CONTENT_EXPORT BrowserPluginGuest : public GuestHost,
 
   void ResendEventToEmbedder(const blink::WebInputEvent& event);
 
+  // TODO(ekaramad): Remove this once https://crbug.com/642826 is resovled.

[Charlie Reis, 2016/09/07 00:22:29]

nit: resolved

[EhsanK, 2016/09/08 18:14:57]

Done.

+  bool is_mime_handler_view_guest() const {

[Charlie Reis, 2016/09/07 00:22:29]

Content/ doesn't know about MIMEHandlerView, so it shouldn't have methods with
that name.  Can we phrase it in terms of BrowserPlugin vs OOPIF?

[EhsanK, 2016/09/08 18:14:57]

Good idea! How about CanUseCrossProcessFrames() for the delegate and
can_use_cross_process_frames() for BPG itself?

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

That sounds better, thanks.

+    return is_mime_handler_view_guest_;
+  }
+
  protected:
 
   // BrowserPluginGuest is a WebContentsObserver of |web_contents| and
@@ -446,6 +452,10 @@ class CONTENT_EXPORT BrowserPluginGuest : public GuestHost,
 
   BrowserPluginGuestDelegate* const delegate_;
 
+  // Whether or not this BrowserPluginGuest corresponds to a guest of tyoe
+  // MimeHandlerView.
+  bool is_mime_handler_view_guest_;
+
   // Weak pointer used to ask GeolocationPermissionContext about geolocation
   // permission.
   base::WeakPtrFactory<BrowserPluginGuest> weak_ptr_factory_;