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 "chrome/browser/guest_view/guest_view_constants.h"
+#include "chrome/browser/guest_view/guest_view_manager.h"
+#include "chrome/browser/guest_view/web_view/web_view_renderer_state.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/common/url_constants.h"
+#include "net/base/url_util.h"
+
+using content::WebContents;
+
+namespace {
+const char kMimeHandlerViewSrc[] = "src";
+}
+
+// static
+const char MimeHandlerViewGuest::Type[] = "mimehandler";
+
+MimeHandlerViewGuest::MimeHandlerViewGuest(
+    content::BrowserContext* browser_context,
+    int guest_instance_id)
+    : GuestView<MimeHandlerViewGuest>(
+        browser_context, guest_instance_id) {
+}
+
+MimeHandlerViewGuest::~MimeHandlerViewGuest() {
+}
+
+bool MimeHandlerViewGuest::CanEmbedderUseGuestView(
+    const std::string& embedder_extension_id) {
+  return true;
+}
+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;
+  DCHECK(create_params.GetString(guestview::kMimeTypeParam, &orig_mime_type));
+  bool has_mime_type_param = create_params.GetString(guestview::kMimeTypeParam,
+                                                     &orig_mime_type);
+  GURL guest_site(base::StringPrintf("%s://%s/",
+                                     content::kGuestScheme,
+                                     embedder_extension_id.c_str()));
+  if (has_mime_type_param) {
+    guest_site = net::AppendOrReplaceQueryParameter(guest_site,
+                                                    guestview::kMimeTypeParam,
+                                                    orig_mime_type);
+  }
+
+  // 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.
+  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;
+  if (extra_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);
+}
+