Adding MimeHandlerView.

chrome/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 "chrome/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
+
+#include "base/strings/stringprintf.h"
+#include "chrome/browser/extensions/chrome_extension_web_contents_observer.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/strings/grit/extensions_strings.h"
+#include "net/base/url_util.h"
+
+using content::WebContents;
+
+namespace {
+const char kMimeHandlerViewSrc[] = "src";
+}
+
+// static
+const char MimeHandlerViewGuest::Type[] = "mimehandler";
+
+// static
+extensions::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.
+  DCHECK(create_params.GetString("mimeType", &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
+  // partition, we should use the same SiteInstance so the existing tag and
+  // the new tag can script each other.
+  extensions::GuestViewManager* guest_view_manager =
+      extensions::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(kMimeHandlerViewSrc, &src) && !src.empty());
+  guest_web_contents()->GetController().LoadURL(
+      GURL(src),
+      content::Referrer(),
+      content::PAGE_TRANSITION_AUTO_TOPLEVEL,
+      std::string());
+}
+
+void MimeHandlerViewGuest::DidInitialize() {
+  AttachWebContentsHelpers(guest_web_contents());
+}
+
+void MimeHandlerViewGuest::AttachWebContentsHelpers(
+    content::WebContents* contents) {
+  // Required for ExtensionHostMsg_PostMessage.
+  extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
+      contents);
+}
+