FileWrapper[Impl] modifications and actually remove the "Impl" class.

webrtc/call/rtc_event_log.cc

Index: webrtc/call/rtc_event_log.cc
diff --git a/webrtc/call/rtc_event_log.cc b/webrtc/call/rtc_event_log.cc
index 90145735eddf90eb720b10a02f1e30f6b2b66196..a8f78ab8d9568ccacb444ac1439ed0f35ce16aee 100644
--- a/webrtc/call/rtc_event_log.cc
+++ b/webrtc/call/rtc_event_log.cc
@@ -222,7 +222,7 @@ bool RtcEventLogImpl::StartLogging(rtc::PlatformFile platform_file,
     }
     return false;
   }
-  if (message.file->OpenFromFileHandle(file_handle, true, false) != 0) {
+  if (message.file->OpenFromFileHandle(file_handle) != 0) {
     LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
     return false;
   }