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extensions/common/constants.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 EXTENSIONS_COMMON_CONSTANTS_H_
 #define EXTENSIONS_COMMON_CONSTANTS_H_
 
 #include "base/files/file_path.h"
+#include "base/strings/string16.h"
 
 namespace extensions {
 
 // Scheme we serve extension content from.
 extern const char kExtensionScheme[];
 
   // The name of the manifest inside an extension.
 extern const base::FilePath::CharType kManifestFilename[];
 
   // The name of locale folder inside an extension.
@@ skipping 26 matching lines @@
 
 // Path to imported modules.
 extern const char kModulesDir[];
 
 // The file extension (.crx) for extensions.
 extern const base::FilePath::CharType kExtensionFileExtension[];
 
 // The file extension (.pem) for private key files.
 extern const base::FilePath::CharType kExtensionKeyFileExtension[];
 
+// Determine whether or not a source came from an extension. |source| can link
+// to a page or a script, and can be external (e.g., "http://www.google.com"),
+// extension-related (e.g., "chrome-extension://<extension_id>/background.js"),
+// or internal (e.g., "event_bindings" or "schemaUtils").
+bool IsSourceFromAnExtension(const base::string16& source);

[Devlin, 2013/08/23 19:47:07]

Is there a better place for this?

[Yoyo Zhou, 2013/08/23 22:54:54]

I'd start a new file, extension_urls.h.

[Devlin, 2013/08/23 23:44:30]

Done. I'll try to move some stuff that makes sense (like kExtensionScheme, and
maybe kGeneratedBackgroundPageFilename) over, too, in a smaller CL.

+
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_CONSTANTS_H_