Set NaN instead of 0 for null modificationTime

webkit/glue/webkit_glue.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 "webkit/glue/webkit_glue.h"
 
 #if defined(OS_WIN)
 #include <objidl.h>
 #include <mlang.h>
 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <sys/utsname.h>
 #endif
 
+#include <limits>
+
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/string_piece.h"
 #include "base/string_tokenizer.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/lock.h"
 #include "base/sys_info.h"
@@ skipping 296 matching lines @@
 }
 
 WebString FilePathToWebString(const FilePath& file_path) {
   return FilePathStringToWebString(file_path.value());
 }
 
 void PlatformFileInfoToWebFileInfo(
     const base::PlatformFileInfo& file_info,
     WebKit::WebFileInfo* web_file_info) {
   DCHECK(web_file_info);
-  web_file_info->modificationTime = file_info.last_modified.ToDoubleT();
+  // WebKit now expects NaN as uninitialized/null Date.
+  if (file_info.last_modified.is_null())
+    web_file_info->modificationTime = std::numeric_limits<double>::quiet_NaN();
+  else
+    web_file_info->modificationTime = file_info.last_modified.ToDoubleT();
   web_file_info->length = file_info.size;
   if (file_info.is_directory)
     web_file_info->type = WebKit::WebFileInfo::TypeDirectory;
   else
     web_file_info->type = WebKit::WebFileInfo::TypeFile;
 }
 
 namespace {
 
 class UserAgentState {
@@ skipping 160 matching lines @@
 
     case WebKit::WebReferrerPolicyAlways:
     case WebKit::WebReferrerPolicyNever:
     case WebKit::WebReferrerPolicyOrigin:
       net_referrer_policy = net::URLRequest::NEVER_CLEAR_REFERRER;
       break;
   }
   request->set_referrer_policy(net_referrer_policy);
 }
 
+COMPILE_ASSERT(std::numeric_limits<double>::has_quiet_NaN, has_quiet_NaN);
+
 } // namespace webkit_glue