FakeVideoCaptureDevice: add support for capturing into Dma-Bufs using VGEM in CrOs

media/video/capture/video_capture_device.cc

 // Copyright 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 "media/video/capture/video_capture_device.h"
 
 #include "base/i18n/timezone.h"
 #include "base/strings/string_util.h"
 
 namespace media {
@@ skipping 112 matching lines @@
     case API_TYPE_UNKNOWN:
     default:
       NOTREACHED() << "Unknown Video Capture API type!";
       return "Unknown API";
   }
 }
 #endif
 
 VideoCaptureDevice::Client::Buffer::~Buffer() {}
 
+base::PlatformFile VideoCaptureDevice::Client::Buffer::AsPlatformFile() {
+  return base::PlatformFile();
+}
+
 VideoCaptureDevice::~VideoCaptureDevice() {}
 
 int VideoCaptureDevice::GetPowerLineFrequencyForLocation() const {
   std::string current_country = base::CountryCodeForCurrentTimezone();
   if (current_country.empty())
     return 0;
   // Sorted out list of countries with 60Hz power line frequency, from
   // http://en.wikipedia.org/wiki/Mains_electricity_by_country
   const char* countries_using_60Hz[] = {
       "AI", "AO", "AS", "AW", "AZ", "BM", "BR", "BS", "BZ", "CA", "CO",
       "CR", "CU", "DO", "EC", "FM", "GT", "GU", "GY", "HN", "HT", "JP",
       "KN", "KR", "KY", "MS", "MX", "NI", "PA", "PE", "PF", "PH", "PR",
       "PW", "SA", "SR", "SV", "TT", "TW", "UM", "US", "VG", "VI", "VE"};
   const char** countries_using_60Hz_end =
       countries_using_60Hz + arraysize(countries_using_60Hz);
   if (std::find(countries_using_60Hz, countries_using_60Hz_end,
                 current_country) == countries_using_60Hz_end) {
     return kPowerLine50Hz;
   }
   return kPowerLine60Hz;
 }
 
 }  // namespace media