content: Extract url utility functions into url_utils.{h,cc}

content/public/common/url_constants.h

Index: content/public/common/url_constants.h
diff --git a/content/public/common/url_constants.h b/content/public/common/url_constants.h
index 967b10c42ae2cb6ff6296345c2c907b7a9a3b557..e6ca477e1282475d4f4874aacd1982521180cb87 100644
--- a/content/public/common/url_constants.h
+++ b/content/public/common/url_constants.h
@@ -9,8 +9,6 @@
 
 // Contains constants for known URLs and portions thereof.
 
-class GURL;
-
 // TODO(jam): rename this to content.
 namespace chrome {
 
@@ -80,14 +78,6 @@ 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_