Add schema chrome-extension-resource:// for extension resources

chrome/browser/extensions/extension_resource_protocols.cc

+// Copyright (c) 2012 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/extensions/extension_resource_protocols.h"
+
+#include "base/file_path.h"
+#include "base/path_service.h"
+#include "chrome/common/chrome_paths.h"
+#include "chrome/common/extensions/extension_file_util.h"
+#include "net/url_request/url_request_file_job.h"
+
+namespace {
+
+class ExtensionResourceProtocolHandler
+    : public net::URLRequestJobFactory::ProtocolHandler {
+ public:
+  ExtensionResourceProtocolHandler() {}
+  virtual ~ExtensionResourceProtocolHandler() {}
+
+  virtual net::URLRequestJob* MaybeCreateJob(
+      net::URLRequest* request) const OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ExtensionResourceProtocolHandler);
+};
+
+class ExtensionResourcesJob : public net::URLRequestFileJob {
+};
+
+// Creates URLRequestJobs for chrome-extension-resource:// URLs.
+net::URLRequestJob*
+ExtensionResourceProtocolHandler::MaybeCreateJob(
+    net::URLRequest* request) const {
+  FilePath root_path;
+  PathService::Get(chrome::DIR_RESOURCES_EXTENSION, &root_path);
+  FilePath path =
+    extension_file_util::ExtensionResourceURLToFilePath(
+        request->url(), root_path);
+  return new net::URLRequestFileJob(request, path);
+}
+
+}  // namespace
+
+net::URLRequestJobFactory::ProtocolHandler*
+CreateExtensionResourceProtocolHandler() {
+  return new ExtensionResourceProtocolHandler();
+}