Fix a bug where redirect chain gets lost on process swap.

chrome/browser/renderer_host/transfer_navigation_resource_handler.cc

Index: chrome/browser/renderer_host/transfer_navigation_resource_handler.cc
diff --git a/chrome/browser/renderer_host/transfer_navigation_resource_handler.cc b/chrome/browser/renderer_host/transfer_navigation_resource_handler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f678ad2e2d434dc7d6c91fcee2df206575fab771
--- /dev/null
+++ b/chrome/browser/renderer_host/transfer_navigation_resource_handler.cc
@@ -0,0 +1,167 @@
+// Copyright (c) 2011 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/renderer_host/transfer_navigation_resource_handler.h"
+
+#include "base/bind.h"
+#include "chrome/browser/profiles/profile_io_data.h"
+#include "chrome/browser/extensions/extension_info_map.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/renderer_host/render_view_host_delegate.h"
+#include "content/browser/renderer_host/resource_dispatcher_host.h"
+#include "content/browser/renderer_host/resource_dispatcher_host_request_info.h"
+
+namespace {
+
+// This code is borrowed from ChromeContentRendererClient. We want to mimic
+// the logic used by the renderer.
+const Extension* GetNonBookmarkAppExtension(
+    const ExtensionSet& extensions, const GURL& url) {
+  // Exclude bookmark apps, which do not use the app process model.
+  const Extension* extension = extensions.GetByURL(ExtensionURLInfo(url));
+  if (extension && extension->from_bookmark())
+    extension = NULL;
+  return extension;
+}
+
+bool CrossesExtensionExtents(
+    const ExtensionSet& extensions,
+    const GURL& old_url,
+    const GURL& new_url) {
+  const Extension* new_url_extension = GetNonBookmarkAppExtension(extensions,
+                                                                  new_url);
+  const Extension* old_url_extension = GetNonBookmarkAppExtension(extensions,
+                                                                  old_url);
+
+  // TODO(creis): Temporary workaround for crbug.com/59285: Only return true if
+  // we would enter an extension app's extent from a non-app, or if we leave an
+  // extension with no web extent.  We avoid swapping processes to exit a hosted
+  // app for now, since we do not yet support postMessage calls from outside the
+  // app back into it (e.g., as in Facebook OAuth 2.0).
+  bool old_url_is_hosted_app = old_url_extension &&
+      !old_url_extension->web_extent().is_empty();
+  if (old_url_is_hosted_app)
+    return false;
+
+  return old_url_extension != new_url_extension;
+}
+
+void RequestTransferURLOnUIThread(int render_process_id,
+                                  int render_view_id,
+                                  GURL new_url,
+                                  GURL referrer,
+                                  WindowOpenDisposition window_open_disposition,
+                                  int64 frame_id,
+                                  const GlobalRequestID& request_id) {
+  RenderViewHost* rvh = RenderViewHost::FromID(render_process_id,
+                                               render_view_id);
+  if (!rvh)
+    return;
+
+  RenderViewHostDelegate* delegate = rvh->delegate();
+  if (!delegate)
+    return;
+
+  delegate->RequestTransferURL(new_url, referrer, window_open_disposition,
+                               frame_id, request_id);
+}
+
+}  // namespace
+
+TransferNavigationResourceHandler::TransferNavigationResourceHandler(
+    ResourceHandler* handler,
+    ResourceDispatcherHost* resource_dispatcher_host,
+    net::URLRequest* request)
+    : next_handler_(handler),
+      rdh_(resource_dispatcher_host),
+      request_(request) {
+}
+
+TransferNavigationResourceHandler::~TransferNavigationResourceHandler() {
+}
+
+bool TransferNavigationResourceHandler::OnUploadProgress(int request_id,
+                                                         uint64 position,
+                                                         uint64 size) {
+  return next_handler_->OnUploadProgress(request_id, position, size);
+}
+
+bool TransferNavigationResourceHandler::OnRequestRedirected(
+    int request_id,
+    const GURL& new_url,
+    content::ResourceResponse* response,
+    bool* defer) {
+
+  ResourceDispatcherHostRequestInfo* info =
+      ResourceDispatcherHost::InfoForRequest(request_);
+
+  // If a toplevel request is redirecting across extension extents, we want to
+  // switch processes. We do this by deferring the redirect and resuming the
+  // request once the navigation controller properly assigns the right process
+  // to host the new URL.
+  // TODO(mpcomplete): handle for cases other than extensions (e.g. WebUI).
+  const content::ResourceContext& resource_context = *info->context();
+  ProfileIOData* io_data =
+      reinterpret_cast<ProfileIOData*>(resource_context.GetUserData(NULL));
+
+  if (info->resource_type() == ResourceType::MAIN_FRAME &&
+      CrossesExtensionExtents(io_data->GetExtensionInfoMap()->extensions(),
+                              request_->url(), new_url)) {
+    int render_process_id, render_view_id;
+    if (ResourceDispatcherHost::RenderViewForRequest(
+            request_, &render_process_id, &render_view_id)) {
+
+      GlobalRequestID global_id(info->child_id(), info->request_id());
+      rdh_->MarkAsTransferredNavigation(global_id, request_);
+
+      content::BrowserThread::PostTask(
+          content::BrowserThread::UI,
+          FROM_HERE,
+          base::Bind(&RequestTransferURLOnUIThread,
+              render_process_id, render_view_id,
+              new_url, GURL(request_->referrer()), CURRENT_TAB,
+              info->frame_id(), global_id));
+
+      *defer = true;
+      return true;
+    }
+  }
+
+  return next_handler_->OnRequestRedirected(
+      request_id, new_url, response, defer);
+}
+
+bool TransferNavigationResourceHandler::OnResponseStarted(
+    int request_id, content::ResourceResponse* response) {
+  return next_handler_->OnResponseStarted(request_id, response);
+}
+
+bool TransferNavigationResourceHandler::OnWillStart(int request_id,
+                                                    const GURL& url,
+                                                    bool* defer) {
+  return next_handler_->OnWillStart(request_id, url, defer);
+}
+
+bool TransferNavigationResourceHandler::OnWillRead(int request_id,
+                                                   net::IOBuffer** buf,
+                                                   int* buf_size,
+                                                   int min_size) {
+  return next_handler_->OnWillRead(request_id, buf, buf_size, min_size);
+}
+
+bool TransferNavigationResourceHandler::OnReadCompleted(int request_id,
+                                                        int* bytes_read) {
+  return next_handler_->OnReadCompleted(request_id, bytes_read);
+}
+
+bool TransferNavigationResourceHandler::OnResponseCompleted(
+    int request_id,
+    const net::URLRequestStatus& status,
+    const std::string& security_info) {
+  return next_handler_->OnResponseCompleted(request_id, status, security_info);
+}
+
+void TransferNavigationResourceHandler::OnRequestClosed() {
+  next_handler_->OnRequestClosed();
+}