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

webrtc/modules/media_file/media_file_utility.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1438 matching lines @@
                      "failed to retrieve file size with stat!");
         return -1;
     }
     FileWrapper* inStreamObj = FileWrapper::Create();
     if(inStreamObj == NULL)
     {
         WEBRTC_TRACE(kTraceMemory, kTraceFile, _id,
                      "failed to create InStream object!");
         return -1;
     }
-    if(inStreamObj->OpenFile(fileName, true) == -1)
-    {
-        delete inStreamObj;
-        WEBRTC_TRACE(kTraceError, kTraceFile, _id,
-                     "failed to open file %s!", fileName);
-        return -1;
+    if (!inStreamObj->OpenFile(fileName, true)) {
+      delete inStreamObj;
+      WEBRTC_TRACE(kTraceError, kTraceFile, _id, "failed to open file %s!",
+                   fileName);
+      return -1;
     }
 
     switch (fileFormat)
     {
         case kFileFormatWavFile:
         {
             if(ReadWavHeader(*inStreamObj) == -1)
             {
                 WEBRTC_TRACE(kTraceError, kTraceFile, _id,
                              "failed to read WAV file header!");
@@ skipping 75 matching lines @@
 }
 
 uint32_t ModuleFileUtility::PlayoutPositionMs()
 {
     WEBRTC_TRACE(kTraceStream, kTraceFile, _id,
                  "ModuleFileUtility::PlayoutPosition()");
 
     return _reading ? _playoutPositionMs : 0;
 }
 }  // namespace webrtc