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

chrome/browser/chrome_content_browser_client.cc

 // 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.
 
 #include "chrome/browser/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 445 matching lines @@
 // If url->host() is "chrome" and url->path() has characters other than the
 // first slash, changes the url from "foo://chrome/bar/" to "foo://bar/" and
 // returns true. Otherwise returns false.
 bool RemoveUberHost(GURL* url) {
   if (url->host() != chrome::kChromeUIUberHost)
     return false;
 
   if (url->path().empty() || url->path() == "/")
     return false;
 
-  const std::string old_path = url->path();
+  const base::StringPiece old_path = url->path();
 
   const std::string::size_type separator = old_path.find('/', 1);
   std::string new_host;
   std::string new_path;
   if (separator == std::string::npos) {
-    new_host = old_path.substr(1);
+    new_host = old_path.substr(1).as_string();
   } else {
-    new_host = old_path.substr(1, separator - 1);
-    new_path = old_path.substr(separator);
+    new_host = old_path.substr(1, separator - 1).as_string();
+    new_path = old_path.substr(separator).as_string();
   }
 
   // Do not allow URLs with paths empty before the first slash since we can't
   // have an empty host. (e.g "foo://chrome//")
   if (new_host.empty())
     return false;
 
   *url = ReplaceURLHostAndPath(*url, new_host, new_path);
 
   DCHECK(url->is_valid());
@@ skipping 2740 matching lines @@
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)
 
 std::unique_ptr<content::MemoryCoordinatorDelegate>
 ChromeContentBrowserClient::GetMemoryCoordinatorDelegate() {
   return memory::ChromeMemoryCoordinatorDelegate::Create();
 }