[Coverity] Fixed call by value to by reference

content/browser/renderer_host/redirect_to_file_resource_handler.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 "content/browser/renderer_host/redirect_to_file_resource_handler.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/file_util_proxy.h"
 #include "base/logging.h"
@@ skipping 135 matching lines @@
   next_handler_->OnRequestClosed();
 }
 
 RedirectToFileResourceHandler::~RedirectToFileResourceHandler() {
   DCHECK(!file_stream_.get());
 }
 
 void RedirectToFileResourceHandler::DidCreateTemporaryFile(
     base::PlatformFileError /*error_code*/,
     base::PassPlatformFile file_handle,
-    FilePath file_path) {
+    const FilePath& file_path) {
   if (request_was_closed_) {
     // If the request was already closed, then don't bother allocating the
     // file_stream_ (otherwise we will leak it).
     return;
   }
   deletable_file_ = DeletableFileReference::GetOrCreate(
       file_path,
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
   file_stream_.reset(new net::FileStream(file_handle.ReleaseValue(),
                                          base::PLATFORM_FILE_WRITE |
@@ skipping 59 matching lines @@
 
 bool RedirectToFileResourceHandler::BufIsFull() const {
   // This is a hack to workaround BufferedResourceHandler's inability to
   // deal with a ResourceHandler that returns a buffer size of less than
   // 2 * net::kMaxBytesToSniff from its OnWillRead method.
   // TODO(darin): Fix this retardation!
   return buf_->RemainingCapacity() <= (2 * net::kMaxBytesToSniff);
 }
 
 }  // namespace content