Fix a time conversion bug on webrtc-internals.

content/browser/media/webrtc_internals.cc

 // Copyright (c) 2013 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/media/webrtc_internals.h"
 
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/media/webrtc_internals_ui_observer.h"
 #include "content/browser/web_contents/web_contents_view.h"
@@ skipping 119 matching lines @@
 
     // Append the update to the end of the log.
     base::ListValue* log = EnsureLogList(record);
     if (!log)
       return;
 
     base::DictionaryValue* log_entry = new base::DictionaryValue();
     if (!log_entry)
       return;
 
-    int64 milliseconds = (base::Time::Now() - base::Time()).InMilliseconds();
-    string time = base::Int64ToString(milliseconds);
+    double epoch_time = base::Time::Now().ToJsTime();
+    string time = base::DoubleToString(epoch_time);
     log_entry->SetString("time", time);
     log_entry->SetString("type", type);
     log_entry->SetString("value", value);
     log->Append(log_entry);
 
     if (observers_.might_have_observers()) {
       base::DictionaryValue update;
       update.SetInteger("pid", static_cast<int>(pid));
       update.SetInteger("lid", lid);
       update.MergeDictionary(log_entry);
@@ skipping 199 matching lines @@
   aec_dump_enabled_ = true;
   for (RenderProcessHost::iterator i(
            content::RenderProcessHost::AllHostsIterator());
        !i.IsAtEnd(); i.Advance()) {
     i.GetCurrentValue()->EnableAecDump(aec_dump_file_path_);
   }
 }
 #endif
 
 }  // namespace content