Move elide_url to its own component

components/secure_display/elide_url.h

 // Copyright 2014 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.
 //
 // This file defines utility functions for eliding URLs.
 
-#ifndef CHROME_BROWSER_UI_ELIDE_URL_H_
-#define CHROME_BROWSER_UI_ELIDE_URL_H_
+#ifndef COMPONENTS_SECURE_DISPLAY_ELIDE_URL_H_
+#define COMPONENTS_SECURE_DISPLAY_ELIDE_URL_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 
 class GURL;
 
 namespace gfx {
 class FontList;
 }
 
+namespace secure_display {
+
+// ElideUrl and Elide host require
+// gfx::GetStringWidthF which is not implemented in Android
+#if !defined(OS_ANDROID)
 // This function takes a GURL object and elides it. It returns a string
 // which composed of parts from subdomain, domain, path, filename and query.
 // A "..." is added automatically at the end if the elided string is bigger
 // than the |available_pixel_width|. For |available_pixel_width| == 0, a
 // formatted, but un-elided, string is returned. |languages| is a comma
 // separated list of ISO 639 language codes and is used to determine what
 // characters are understood by a user. It should come from
 // |prefs::kAcceptLanguages|.
 //
 // Note: in RTL locales, if the URL returned by this function is going to be
 // displayed in the UI, then it is likely that the string needs to be marked
 // as an LTR string (using base::i18n::WrapStringWithLTRFormatting()) so that it
 // is displayed properly in an RTL context. Please refer to
 // http://crbug.com/6487 for more information.
 base::string16 ElideUrl(const GURL& url,
                         const gfx::FontList& font_list,
                         float available_pixel_width,
                         const std::string& languages);
 
 // This function takes a GURL object and elides the host to fit within
 // the given width. The function will never elide past the TLD+1 point,
 // but after that, will leading-elide the domain name to fit the width.
 // Example: http://sub.domain.com ---> "...domain.com", or "...b.domain.com"
 // depending on the width.
 base::string16 ElideHost(const GURL& host_url,
                          const gfx::FontList& font_list,
                          float available_pixel_width);
+#endif  // !defined(OS_ANDROID)
 
 // This is a convenience function for formatting a URL in a concise and
 // human-friendly way, to help users make security-related decisions (or in
 // other circumstances when people need to distinguish sites, origins, or
 // otherwise-simplified URLs from each other).
 //
 // Internationalized domain names (IDN) may be presented in Unicode if
 // |languages| accepts the Unicode representation (see |net::FormatUrl| for more
 // details on the algorithm).
 //
 // - Omits the path for standard schemes, excepting file and filesystem.
 // - Omits the port if it is the default for the scheme.
 //
 // Do not use this for URLs which will be parsed or sent to other applications.
 base::string16 FormatUrlForSecurityDisplay(const GURL& origin,
                                            const std::string& languages);
 
-#endif  // CHROME_BROWSER_UI_ELIDE_URL_H_
+}  // namespace secure_display
+
+#endif  // COMPONENTS_SECURE_DISPLAY_ELIDE_URL_H_