Make ProtocolHandlerRegistry use 307 to redirect instead of 302.

chrome/browser/custom_handlers/protocol_handler_registry.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/custom_handlers/protocol_handler_registry.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 134 matching lines @@
                                           request->url().scheme());
   if (handler.IsEmpty())
     return NULL;
 
   GURL translated_url(handler.TranslateUrl(request->url()));
   if (!translated_url.is_valid())
     return NULL;
 
   return new net::URLRequestRedirectJob(
       request, network_delegate, translated_url,
-      net::URLRequestRedirectJob::REDIRECT_302_FOUND);
+      net::URLRequestRedirectJob::REDIRECT_307_TEMPORARY_REDIRECT);
 }
 
 // URLInterceptor ------------------------------------------------------------
 
 // Instances of this class are produced for ownership by the IO
 // thread where it handler URL requests. We should never hold
 // any pointers on this class, only produce them in response to
 // requests via |ProtocolHandlerRegistry::CreateURLInterceptor|.
 class ProtocolHandlerRegistry::URLInterceptor
     : public net::URLRequestJobFactory::Interceptor {
@@ skipping 709 matching lines @@
 }
 
 net::URLRequestJobFactory::Interceptor*
     ProtocolHandlerRegistry::CreateURLInterceptor() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   // this is always created on the UI thread (in profile_io's
   // InitializeOnUIThread. Any method calls must be done
   // on the IO thread (this is checked).
   return new URLInterceptor(core_);
 }