Allows webview to access extension resources.

extensions/browser/url_request_util.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/url_request_util.h"
+
+#include <string>
+
+#include "content/public/browser/resource_request_info.h"
+#include "extensions/browser/guest_view/web_view/web_view_renderer_state.h"
+#include "extensions/browser/info_map.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/manifest_handlers/webview_info.h"
+#include "net/url_request/url_request.h"
+
+namespace extensions {
+namespace url_request_util {
+
+bool AllowCrossRendererResourceLoad(net::URLRequest* request,
+                                    bool is_incognito,
+                                    const Extension* extension,
+                                    InfoMap* extension_info_map) {
+  const content::ResourceRequestInfo* info =
+      content::ResourceRequestInfo::ForRequest(request);
+
+  // Extensions with webview: allow loading certain resources by guest renderers
+  // with privileged partition IDs as specified in the manifest file.
+  std::string partition_id;
+  bool is_guest = WebViewRendererState::GetInstance()->GetPartitionID(
+      info->GetChildID(), &partition_id);
+  std::string resource_path = request->url().path();
+  if (is_guest && WebviewInfo::IsResourceWebviewAccessible(
+                      extension, partition_id, resource_path)) {
+    return true;
+  }
+
+  // No special exception. Block the load.
+  return false;
+}
+
+bool IsWebViewRequest(net::URLRequest* request) {
+  const content::ResourceRequestInfo* info =
+      content::ResourceRequestInfo::ForRequest(request);
+  // |info| can be NULL sometimes: http://crbug.com/370070.
+  if (!info)
+    return false;
+  return WebViewRendererState::GetInstance()->IsGuest(info->GetChildID());
+}
+
+}  // namespace url_request_util
+}  // namespace extensions