Force MimeHandlerView to always use BrowserPlugin

content/public/browser/browser_plugin_guest_delegate_mode.h

Index: content/public/browser/browser_plugin_guest_delegate_mode.h
diff --git a/content/public/browser/browser_plugin_guest_delegate_mode.h b/content/public/browser/browser_plugin_guest_delegate_mode.h
new file mode 100644
index 0000000000000000000000000000000000000000..0fd18405b79877899f66df3e7954fd0bffb53c57
--- /dev/null
+++ b/content/public/browser/browser_plugin_guest_delegate_mode.h
@@ -0,0 +1,39 @@
+// 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_COMMON_BROWSER_PLUGIN_GUEST_DELEGATE_MODE_H_
+#define CONTENT_PUBLIC_COMMON_BROWSER_PLUGIN_GUEST_DELEGATE_MODE_H_

[lfg, 2016/07/30 00:05:25]

Update defines.

[EhsanK, 2016/09/01 21:51:47]

Done.

+
+#include "base/macros.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class WebContents;
+
+class CONTENT_EXPORT BrowserPluginGuestDelegateMode {

[lfg, 2016/07/30 00:05:25]

This name is confusing, it's not obvious what it means. Why not just use
BrowserPluginGuestMode just like the other function? If it's because of the name
clash, I think it's fine to just use a namespace here, the class doesn't really
provide anything here.

[EhsanK, 2016/09/01 21:51:47]

Done.

+ public:
+  enum DelegateMode {

[lfg, 2016/07/30 00:05:25]

This seems overly complicated and doesn't add much. What's the difference in
behavior between NONE and NOT_USING_CROSS_PROCESS_FRAMES? There shouldn't be
any. The enum makes the code harder to understand instead of easier.

[EhsanK, 2016/09/01 21:51:47]

Done.

+    /* The WebContents does not correspond to a guest. */
+    NONE,
+    /* The WebContents is implemented using cross process frames. */
+    USING_CROSS_PROCESS_FRAMES,
+    /* The WebContents is not using cross process frames, but it is a guest. */
+    NOT_USING_CROSS_PROCESS_FRAMES,
+  };
+
+  // TODO(ekaramad): Remove the following method once MimeHandlerViewGuest uses
+  // OOPIF (https://crbug.com/563285).
+  // Returns the corresponding DelegateMode for the given |web_contents|.
+  static DelegateMode DelegateModeFromWebContents(WebContents* web_contents);
+
+ private:
+  BrowserPluginGuestDelegateMode();  // Not instantiable
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuestDelegateMode);
+};
+
+}  // namespace
+
+#endif  // CONTENT_PUBLIC_COMMON_BROWSER_PLUGIN_GUEST_DELEGATE_MODE_H_