Refactor GuestViewContainer to split out WebView related logic and MimeHandlerView related logic.

extensions/renderer/guest_view/mime_handler_view_container.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/renderer/guest_view/mime_handler_view_container.h"
+
+#include "content/public/renderer/render_frame.h"
+#include "extensions/common/extension_messages.h"
+#include "extensions/common/guest_view/guest_view_constants.h"
+
+namespace extensions {
+
+MimeHandlerViewContainer::MimeHandlerViewContainer(
+    content::RenderFrame* render_frame,
+    const std::string& mime_type)
+    : GuestViewContainer(render_frame),
+      mime_type_(mime_type) {
+  DCHECK(!mime_type_.empty());
+}
+
+MimeHandlerViewContainer::~MimeHandlerViewContainer() {}
+
+void MimeHandlerViewContainer::DidFinishLoading() {
+  DCHECK_NE(element_instance_id_, guestview::kInstanceIDNone);
+  render_frame()->Send(new ExtensionHostMsg_CreateMimeHandlerViewGuest(
+      routing_id(), html_string_, mime_type_, element_instance_id_));
+}
+
+void MimeHandlerViewContainer::DidReceiveData(const char* data,
+                                              int data_length) {
+  std::string value(data, data_length);
+  html_string_ += value;
+}
+
+void MimeHandlerViewContainer::Ready() {}
+
+bool MimeHandlerViewContainer::HandlesMessage(const IPC::Message& message) {
+  return message.type() == ExtensionMsg_CreateMimeHandlerViewGuestACK::ID ||
+    message.type() == ExtensionMsg_GuestAttached::ID;
+}
+
+bool MimeHandlerViewContainer::OnMessage(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(MimeHandlerViewContainer, message)
+    IPC_MESSAGE_HANDLER(ExtensionMsg_CreateMimeHandlerViewGuestACK,
+                        OnCreateMimeHandlerViewGuestACK)
+    IPC_MESSAGE_HANDLER(ExtensionMsg_GuestAttached, OnGuestAttached)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void MimeHandlerViewContainer::OnCreateMimeHandlerViewGuestACK(
+    int element_instance_id) {
+  DCHECK_NE(element_instance_id_, guestview::kInstanceIDNone);
+  DCHECK_EQ(element_instance_id_, element_instance_id);
+  render_frame()->AttachGuest(element_instance_id);
+}
+
+void MimeHandlerViewContainer::OnGuestAttached(int guest_proxy_routing_id) {
+}
+
+}  // namespace extensions