move 'web_accessible_resources' parsing out of Extension class.

chrome/common/extensions/web_accessible_resources_handler.h

+// Copyright (c) 2013 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_WEB_ACCESSIBLE_RESOURCES_HANDLER_H_
+#define CHROME_COMMON_EXTENSIONS_WEB_ACCESSIBLE_RESOURCES_HANDLER_H_
+
+#include <string>
+
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/manifest_handler.h"
+
+namespace extensions {
+
+// A structure to hold the web accessible extension resources
+// that may be specified in the manifest of an extension using
+// "web_accessible_resources" key.
+struct WebAccessibleResourcesInfo : public Extension::ManifestData {
+  // Define out of line constructor/destructor to please Clang.
+  WebAccessibleResourcesInfo();
+  virtual ~WebAccessibleResourcesInfo();
+
+  // Returns true if the specified resource is web accessible.
+  static bool IsResourceWebAccessible(const Extension* extension,
+                                      const std::string& relative_path);
+
+  // Returns true when 'web_accessible_resources' are defined for the extension.
+  static bool HasWebAccessibleResources(const Extension* extension);
+
+  // Optional list of web accessible extension resources.
+  URLPatternSet web_accessible_resources_;
+};
+
+// Parses the "web_accessible_resources" manifest key.
+class WebAccessibleResourcesHandler : public ManifestHandler {
+ public:
+  WebAccessibleResourcesHandler();
+  virtual ~WebAccessibleResourcesHandler();
+
+  virtual bool Parse(const base::Value* value,
+                     Extension* extension,
+                     string16* error) OVERRIDE;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_WEB_ACCESSIBLE_RESOURCES_HANDLER_H_