Add keyboard handler for mime-handler-view.

extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc

 // Copyright 2014 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.
 
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
 
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/url_constants.h"
@@ skipping 76 matching lines @@
   std::string src;
   DCHECK(attach_params()->GetString(mime_handler_view::kSrc, &src) &&
          !src.empty());
   web_contents()->GetController().LoadURL(
       GURL(src),
       content::Referrer(),
       content::PAGE_TRANSITION_AUTO_TOPLEVEL,
       std::string());
 }
 
+void MimeHandlerViewGuest::HandleKeyboardEvent(
+    WebContents* source,
+    const content::NativeWebKeyboardEvent& event) {
+  if (!attached())
+    return;
+
+  // Send the keyboard events back to the embedder to reprocess them.
+  // TODO(fsamuel): This introduces the possibility of out-of-order keyboard
+  // events because the guest may be arbitrarily delayed when responding to
+  // keyboard events. In that time, the embedder may have received and processed
+  // additional key events. This needs to be fixed as soon as possible.

[lazyboy, 2014/09/08 21:48:36]

I'm not sure if the comment is relevant for mime-handler-view.

[Fady Samuel, 2014/09/08 21:51:38]

Yes, it is still relevant unfortunately.

+  // See http://crbug.com/229882.
+  embedder_web_contents()->GetDelegate()->HandleKeyboardEvent(web_contents(),
+                                                              event);
+}
+
 }  // namespace extensions