Revert 175890: actually, looks like we want this to also help move chromeos webui pages out of src/…

content/public/common/url_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 CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_
 #define CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_
 
 #include "content/common/content_export.h"
 
 // Contains constants for known URLs and portions thereof.
 
+class GURL;
+
 // TODO(jam): rename this to content.
 namespace chrome {
 
 // Canonical schemes you can use as input to GURL.SchemeIs().
 // TODO(jam): some of these don't below in the content layer, but are accessed
 // from there.
 CONTENT_EXPORT extern const char kAboutScheme[];
 CONTENT_EXPORT extern const char kBlobScheme[];
 CONTENT_EXPORT extern const char kChromeDevToolsScheme[];
 CONTENT_EXPORT extern const char kChromeInternalScheme[];
@@ skipping 44 matching lines @@
 CONTENT_EXPORT extern const char kChromeUINetworkViewCacheURL[];
 CONTENT_EXPORT extern const char kChromeUIShorthangURL[];
 
 // Special URL used to swap out a view being rendered by another process.
 extern const char kSwappedOutURL[];
 
 // Null terminated list of schemes that are savable. This function can be
 // invoked on any thread.
 CONTENT_EXPORT const char* const* GetSavableSchemes();
 
+// Returns true if the url has a scheme for WebUI.  See also
+// WebUIControllerFactory::UseWebUIForURL in the browser process.
+CONTENT_EXPORT bool HasWebUIScheme(const GURL& url);
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_