Add <extensionview>

extensions/browser/guest_view/extension_view/extension_view_guest.cc

+// 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.
+
+#include "extensions/browser/guest_view/extension_view/extension_view_guest.h"
+
+#include "base/metrics/user_metrics.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/common/result_codes.h"
+#include "extensions/browser/api/extensions_api_client.h"
+#include "extensions/browser/guest_view/extension_view/extension_view_constants.h"
+#include "extensions/common/constants.h"
+#include "extensions/common/extension_messages.h"
+#include "extensions/strings/grit/extensions_strings.h"
+
+using content::WebContents;
+using namespace extensions::core_api;
+
+namespace extensions {
+
+// static
+const char ExtensionViewGuest::Type[] = "extensionview";
+
+ExtensionViewGuest::ExtensionViewGuest(content::WebContents* owner_web_contents,
+                                       int guest_instance_id)
+    : GuestView<ExtensionViewGuest>(owner_web_contents, guest_instance_id) {
+}
+
+ExtensionViewGuest::~ExtensionViewGuest() {
+}
+
+// static
+extensions::GuestViewBase* ExtensionViewGuest::Create(
+    content::WebContents* owner_web_contents,
+    int guest_instance_id) {
+  return new ExtensionViewGuest(owner_web_contents, guest_instance_id);
+}
+
+void ExtensionViewGuest::NavigateGuest(const std::string& src,
+                                       bool force_navigation) {
+  if (src.empty())
+    return;
+
+  GURL url(src);

[Fady Samuel, 2015/01/27 22:59:56]

The URL may be invalid. Check here.

[apacible, 2015/01/28 02:43:31]

Done.

+  if (!force_navigation && (url == view_page_))
+    return;
+
+  web_contents()->GetRenderProcessHost()->FilterURL(false, &url);
+  web_contents()->GetController().LoadURL(url, content::Referrer(),
+                                          ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
+                                          std::string());
+
+  view_page_ = url;
+}
+
+// GuestViewBase implementation.
+void ExtensionViewGuest::CreateWebContents(
+    const base::DictionaryValue& create_params,
+    const WebContentsCreatedCallback& callback) {
+  std::string str;
+  if (!create_params.GetString(extensionview::kAttributeSrc, &str))

[Fady Samuel, 2015/01/27 22:59:56]

Please call the callback with nullptr if you're going to exit early. Note to
self: I need to implement a CallbackRunner or something similar that uses RAII
to ensure that the callback is call in all early exits.

[apacible, 2015/01/28 02:43:31]

Done.

+    return;
+
+  GURL source(str);

[Fady Samuel, 2015/01/27 22:59:56]

Check if the URL is valid and exit earliy if not.

[apacible, 2015/01/28 02:43:31]

Done.

+
+  content::SiteInstance* view_site_instance =
+      content::SiteInstance::CreateForURL(browser_context(), source);
+
+  WebContents::CreateParams params(browser_context(), view_site_instance);
+  params.guest_delegate = this;
+  callback.Run(WebContents::Create(params));
+}
+
+void ExtensionViewGuest::DidAttachToEmbedder() {
+  ApplyAttributes(*attach_params());
+}
+
+const char* ExtensionViewGuest::GetAPINamespace() const {
+  return extensionview::kAPINamespace;
+}
+
+int ExtensionViewGuest::GetTaskPrefix() const {
+  return IDS_EXTENSION_TASK_MANAGER_EXTENSIONVIEW_TAG_PREFIX;
+}
+
+// content::WebContentsObserver implementation.
+bool ExtensionViewGuest::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ExtensionViewGuest, message)
+  IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
+  IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+// Private
+void ExtensionViewGuest::OnRequest(
+    const ExtensionHostMsg_Request_Params& params) {
+  extension_function_dispatcher_->Dispatch(params,
+                                           web_contents()->GetRenderViewHost());
+}
+
+void ExtensionViewGuest::ApplyAttributes(const base::DictionaryValue& params) {
+  std::string src;
+  params.GetString(extensionview::kAttributeSrc, &src);
+  NavigateGuest(src, false /* force_navigation */);
+}
+
+}  // namespace extensions