Enable extension APIs for content scripts.

chrome/common/extensions/api/extension_api.h

+// Copyright (c) 2011 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_EXTENSION_API_H_
+#define CHROME_COMMON_EXTENSIONS_API_EXTENSION_API_H_
+#pragma once
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/singleton.h"
+
+namespace base {
+class DictionaryValue;
+class ListValue;
+}
+
+namespace extensions {
+
+class ExtensionAPI {

[Matt Perry, 2011/11/11 20:07:19]

please add a class comment

[Aaron Boodman, 2011/11/11 23:12:02]

Done.

+ public:
+  static ExtensionAPI* GetInstance();
+
+  bool IsFullNameUnprivileged(const std::string& name) const;

[Matt Perry, 2011/11/11 20:07:19]

some method comments too

[Matt Perry, 2011/11/11 20:07:19]

this name leads to double negatives (i.e. !IsUnprivileged). i think it would
read better as IsPrivileged.

[Aaron Boodman, 2011/11/11 23:12:02]

Done.

[Aaron Boodman, 2011/11/11 23:12:02]

Yeah, agree, but the default is privileged, so I think it makes the
implementation clearer to leave it as-is.

[Matt Perry, 2011/11/11 23:35:24]

meh, i don't think the default really matters to consumers. if the default for
View is visible, should it have an is_invisible() accessor?

+
+ private:
+  friend struct DefaultSingletonTraits<ExtensionAPI>;
+
+  ExtensionAPI();

[Matt Perry, 2011/11/11 20:07:19]

declare a destructor and implement it in the .cc file:
http://dev.chromium.org/developers/coding-style/cpp-dos-and-donts#TOC-Stop-in...

[Aaron Boodman, 2011/11/11 23:12:02]

Done.

+
+  base::DictionaryValue* FindListItem(base::ListValue* list,
+                                      const std::string& property_name,
+                                      const std::string& property_value) const;
+
+  bool IsChildNameUnprivileged(base::DictionaryValue* namespace_node,
+                               const std::string& child_kind,
+                               const std::string& child_name) const;
+
+  static ExtensionAPI* instance_;
+
+  scoped_ptr<base::ListValue> value_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionAPI);
+};
+
+}  // extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_API_EXTENSION_API_H_