Add "sidebar" section to extension manifest:...

chrome/common/extensions/extension_sidebar_utils.cc

+// Copyright (c) 2010 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/common/extensions/extension_sidebar_utils.h"
+
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_error_utils.h"
+#include "chrome/common/url_constants.h"
+#include "googleurl/src/gurl.h"
+
+namespace {
+
+// Errors.
+const char kInvalidUrlError[] = "Invalid url: \"*\".";
+
+bool CanUseHost(const Extension* extension,
+                const GURL& url,
+                std::string* error) {
+  if (extension->HasHostPermission(url))
+    return true;
+
+  *error = ExtensionErrorUtils::FormatErrorMessage(
+      extension_manifest_errors::kCannotAccessPage, url.spec());
+  return false;
+}
+
+}  // namespace
+
+namespace extension_sidebar_utils {
+
+std::string GetExtensionIdByContentId(const std::string& content_id) {
+  // At the moment, content_id == extension_id.
+  return content_id;
+}
+
+GURL ResolveAndVerifyUrl(const std::string& url_string,
+                         const Extension* extension,
+                         std::string* error) {
+  // Resolve possibly relative URL.
+  GURL url(url_string);
+  if (!url.is_valid())
+    url = extension->GetResourceURL(url_string);
+
+  if (!url.is_valid()) {
+    *error = ExtensionErrorUtils::FormatErrorMessage(kInvalidUrlError,
+                                                     url_string);
+    return GURL();
+  }
+  if (!url.SchemeIs(chrome::kExtensionScheme) &&
+      !CanUseHost(extension, url, error)) {
+    return GURL();
+  }
+  // Disallow requests outside of the requesting extension view's extension.
+  if (url.SchemeIs(chrome::kExtensionScheme)) {
+    std::string extension_id(url.host());
+    if (extension_id != extension->id())
+      return GURL();
+  }
+
+  return url;
+}
+
+}  // namespace extension_sidebar_utils