[WIP] make GURL::path() return a StringPiece

url/gurl.h

 // Copyright 2013 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 URL_GURL_H_
 #define URL_GURL_H_
 
 #include <stddef.h>
 
 #include <iosfwd>
@@ skipping 305 matching lines @@
   }
   base::StringPiece port_piece() const {
     return ComponentStringPiece(parsed_.port);
   }
 
   // Including first slash following host, up to the query. The URL
   // "http://www.google.com/" has a path of "/".
   bool has_path() const {
     return parsed_.path.len >= 0;
   }
-  std::string path() const {
-    return ComponentString(parsed_.path);
-  }
+
+  base::StringPiece path() const { return ComponentStringPiece(parsed_.path); }
   base::StringPiece path_piece() const {
     return ComponentStringPiece(parsed_.path);
   }
 
   // Stuff following '?' up to the ref. The getters will not include the '?'.
   bool has_query() const {
     return parsed_.query.len >= 0;
   }
   std::string query() const {
     return ComponentString(parsed_.query);
@@ skipping 114 matching lines @@
 URL_EXPORT bool operator==(const GURL& x, const GURL& y);
 URL_EXPORT bool operator!=(const GURL& x, const GURL& y);
 
 // Equality operator for comparing raw spec_. This should be used in place of
 // url == GURL(spec) where |spec| is known (i.e. constants). This is to prevent
 // needlessly re-parsing |spec| into a temporary GURL.
 URL_EXPORT bool operator==(const GURL& x, const base::StringPiece& spec);
 URL_EXPORT bool operator!=(const GURL& x, const base::StringPiece& spec);
 
 #endif  // URL_GURL_H_