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

net/base/filename_util.cc

 // 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.
 
 #include "net/base/filename_util.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
@@ skipping 55 matching lines @@
   if (!url.is_valid())
     return false;
 
 #if defined(OS_WIN)
   std::string path;
   std::string host = url.host();
   if (host.empty()) {
     // URL contains no host, the path is the filename. In this case, the path
     // will probably be preceeded with a slash, as in "/C:/foo.txt", so we
     // trim out that here.
-    path = url.path();
+    path = url.path().as_string();
     size_t first_non_slash = path.find_first_not_of("/\\");
     if (first_non_slash != std::string::npos && first_non_slash > 0)
       path.erase(0, first_non_slash);
   } else {
     // URL contains a host: this means it's UNC. We keep the preceeding slash
     // on the path.
     path = "\\\\";
     path.append(host);
-    path.append(url.path());
+    path.append(url.path().as_string());
   }
   std::replace(path.begin(), path.end(), '/', '\\');
 #else  // defined(OS_WIN)
   // Firefox seems to ignore the "host" of a file url if there is one. That is,
   // file://foo/bar.txt maps to /bar.txt.
   // TODO(dhg): This should probably take into account UNCs which could
   // include a hostname other than localhost or blank
-  std::string path = url.path();
+  std::string path = url.path().as_string();
 #endif  // !defined(OS_WIN)
 
   if (path.empty())
     return false;
 
   // GURL stores strings as percent-encoded 8-bit, this will undo if possible.
   path = UnescapeURLComponent(
       path, UnescapeRule::SPACES |
                 UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS);
 
@@ skipping 85 matching lines @@
 
   for (size_t i = 0; i < arraysize(magic_names); ++i) {
     if (filename_lower == magic_names[i])
       return true;
   }
 
   return false;
 }
 
 }  // namespace net