Adding MimeHandlerView.

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"
+#include "extensions/browser/guest_view/guest_view_constants.h"
+#include "extensions/browser/guest_view/guest_view_manager.h"
+#include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_constants.h"
+#include "extensions/strings/grit/extensions_strings.h"
+#include "net/base/url_util.h"
+
+using content::WebContents;
+
+namespace extensions {
+
+// static
+const char MimeHandlerViewGuest::Type[] = "mimehandler";
+
+// static
+GuestViewBase* MimeHandlerViewGuest::Create(
+    content::BrowserContext* browser_context,
+    int guest_instance_id) {
+  return new MimeHandlerViewGuest(browser_context, guest_instance_id);
+}
+
+MimeHandlerViewGuest::MimeHandlerViewGuest(
+    content::BrowserContext* browser_context,
+    int guest_instance_id)
+    : GuestView<MimeHandlerViewGuest>(browser_context, guest_instance_id) {
+}
+
+MimeHandlerViewGuest::~MimeHandlerViewGuest() {
+}
+
+const char* MimeHandlerViewGuest::GetAPINamespace() const {
+  return "mimeHandlerViewGuestInternal";
+}
+
+int MimeHandlerViewGuest::GetTaskPrefix() const {
+  return IDS_EXTENSION_TASK_MANAGER_MIMEHANDLERVIEW_TAG_PREFIX;
+}
+
+void MimeHandlerViewGuest::CreateWebContents(
+    const std::string& embedder_extension_id,
+    int embedder_render_process_id,
+    const base::DictionaryValue& create_params,
+    const WebContentsCreatedCallback& callback) {
+  std::string orig_mime_type;
+  // TODO(lazyboy): "mimeType" in a constant.

[Fady Samuel, 2014/09/02 21:53:25]

Stale comment? Remove?

[lazyboy, 2014/09/02 22:03:19]

Done.

+  DCHECK(create_params.GetString(mimehandlerview::kMimeType, &orig_mime_type) &&
+         !orig_mime_type.empty());
+  std::string guest_site_str;
+  // Note that we put a prefix "mime-" before the mime type so that this
+  // can never collide with an extension ID.
+  guest_site_str = base::StringPrintf(
+      "%s://mime-%s", content::kGuestScheme, orig_mime_type.c_str());
+  GURL guest_site(guest_site_str);
+
+  // If we already have a webview tag in the same app using the same storage

[Fady Samuel, 2014/09/02 21:53:25]

Update comment. It says webview here.

[lazyboy, 2014/09/02 22:03:19]

Done.

+  // partition, we should use the same SiteInstance so the existing tag and
+  // the new tag can script each other.
+  GuestViewManager* guest_view_manager =
+      GuestViewManager::FromBrowserContext(browser_context());
+  content::SiteInstance* guest_site_instance =
+      guest_view_manager->GetGuestSiteInstance(guest_site);
+  if (!guest_site_instance) {
+    // Create the SiteInstance in a new BrowsingInstance, which will ensure
+    // that guests from different render process are not allowed to send
+    // messages to each other.
+    guest_site_instance =
+        content::SiteInstance::CreateForURL(browser_context(), guest_site);
+  }
+  WebContents::CreateParams params(browser_context(), guest_site_instance);
+  params.guest_delegate = this;
+  callback.Run(WebContents::Create(params));
+}
+
+void MimeHandlerViewGuest::DidAttachToEmbedder() {
+  std::string src;
+  DCHECK(attach_params()->GetString(mimehandlerview::kSrc, &src) &&
+         !src.empty());
+  guest_web_contents()->GetController().LoadURL(
+      GURL(src),
+      content::Referrer(),
+      content::PAGE_TRANSITION_AUTO_TOPLEVEL,
+      std::string());
+}
+
+}  // namespace extensions