Move GuestView IPCs out of ExtensionMessageFilter to GuestViewMessageFilter

extensions/browser/guest_view/guest_view_message_filter.h

Index: extensions/browser/guest_view/guest_view_message_filter.h
diff --git a/extensions/browser/guest_view/guest_view_message_filter.h b/extensions/browser/guest_view/guest_view_message_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..9321973906992a95c068a76909acdeb0a941a0aa
--- /dev/null
+++ b/extensions/browser/guest_view/guest_view_message_filter.h
@@ -0,0 +1,81 @@
+// 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 EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MESSAGE_FILTER_H_
+#define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MESSAGE_FILTER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "content/public/browser/browser_message_filter.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace content {
+class BrowserContext;
+class WebContents;
+}
+
+namespace gfx {
+class Size;
+}
+
+namespace extensions {
+
+// This class filters out incoming GuestView-specific IPC messages from the
+// renderer process. It is created on the UI thread. Messages may be handled on
+// the IO thread or the UI thread.
+class GuestViewMessageFilter : public content::BrowserMessageFilter {
+ public:
+  GuestViewMessageFilter(int render_process_id,
+                         content::BrowserContext* context);
+
+  int render_process_id() { return render_process_id_; }
+
+ private:
+  friend class content::BrowserThread;
+  friend class base::DeleteHelper<GuestViewMessageFilter>;
+
+  ~GuestViewMessageFilter() override;
+
+  // content::BrowserMessageFilter implementation.
+  void OverrideThreadForMessage(const IPC::Message& message,
+                                content::BrowserThread::ID* thread) override;
+  void OnDestruct() const override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+  // Message handlers on the UI thread.
+  void OnExtensionAttachGuest(int routing_id,
+                              int element_instance_id,
+                              int guest_instance_id,
+                              const base::DictionaryValue& attach_params);
+  void OnExtensionCreateMimeHandlerViewGuest(int render_frame_id,
+                                             const std::string& view_id,
+                                             int element_instance_id,
+                                             const gfx::Size& element_size);
+
+  // Runs on UI thread.
+  void MimeHandlerViewGuestCreatedCallback(int element_instance_id,
+                                           int embedder_render_process_id,
+                                           int embedder_render_frame_id,
+                                           const gfx::Size& element_size,
+                                           content::WebContents* web_contents);
+
+  const int render_process_id_;
+
+  // Should only be accessed on the UI thread.
+  content::BrowserContext* browser_context_;
+
+  // Weak pointers produced by this factory are bound to the IO thread.
+  base::WeakPtrFactory<GuestViewMessageFilter> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(GuestViewMessageFilter);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MESSAGE_FILTER_H_