clang/win: Let some chromium_code targets build with -Wextra.

media/capture/video/win/video_capture_device_mf_win.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 "media/capture/video/win/video_capture_device_mf_win.h"
 
 #include <mfapi.h>
 #include <mferror.h>
 
 #include "base/location.h"
@@ skipping 153 matching lines @@
   } static const kFormatMap[] = {
       {MFVideoFormat_I420, PIXEL_FORMAT_I420},
       {MFVideoFormat_YUY2, PIXEL_FORMAT_YUY2},
       {MFVideoFormat_UYVY, PIXEL_FORMAT_UYVY},
       {MFVideoFormat_RGB24, PIXEL_FORMAT_RGB24},
       {MFVideoFormat_ARGB32, PIXEL_FORMAT_ARGB},
       {MFVideoFormat_MJPG, PIXEL_FORMAT_MJPEG},
       {MFVideoFormat_YV12, PIXEL_FORMAT_YV12},
   };
 
-  for (int i = 0; i < arraysize(kFormatMap); ++i) {
-    if (kFormatMap[i].guid == guid) {
-      *format = kFormatMap[i].format;
+  for (const auto& kFormat : kFormatMap) {
+    if (kFormat.guid == guid) {
+      *format = kFormat.format;
       return true;
     }
   }
 
   return false;
 }
 
 const std::string VideoCaptureDevice::Name::GetModel() const {
   const size_t vid_prefix_size = sizeof(kVidPrefix) - 1;
   const size_t pid_prefix_size = sizeof(kPidPrefix) - 1;
@@ skipping 135 matching lines @@
     HRESULT hr) {
   if (client_.get()) {
     client_->OnError(
         from_here,
         base::StringPrintf("VideoCaptureDeviceMFWin: %s",
                            logging::SystemErrorCodeToString(hr).c_str()));
   }
 }
 
 }  // namespace media