Move the parsing of homepage_url" and "devtools_page" out of Extension.

chrome/common/extensions/api/devtools/devtools_page_handler.h

+// 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_API_DEVTOOLS_DEVTOOLS_PAGE_HANDLER_H_
+#define CHROME_COMMON_EXTENSIONS_API_DEVTOOLS_DEVTOOLS_PAGE_HANDLER_H_
+
+#include <string>
+
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/manifest_handler.h"
+
+namespace extensions {
+
+class Extension;
+
+struct DevtoolsPageInfo : public Extension::ManifestData {
+
+  // Optional URL to a devtools extension page.
+  GURL devtools_url_;
+
+  static const GURL devtools_url(const Extension* extension);
+};
+
+// Parses the "devtools_page" manifest key.
+class DevtoolsPageHandler : public ManifestHandler {
+ public:
+  DevtoolsPageHandler();
+  virtual ~DevtoolsPageHandler();
+
+  virtual bool Parse(const base::Value* value,
+                     Extension* extension,
+                     string16* error) OVERRIDE;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_API_DEVTOOLS_DEVTOOLS_PAGE_HANDLER_H_