Add DesktopCapturerId and attach it to DesktopFrame

webrtc/modules/desktop_capture/desktop_frame.cc

 /*
  *  Copyright (c) 2013 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.
  */
 
 #include "webrtc/modules/desktop_capture/desktop_frame.h"
 
 #include <utility>
 
 #include <string.h>
 
 #include "webrtc/base/checks.h"
 
 namespace webrtc {
 
 DesktopFrame::DesktopFrame(DesktopSize size,
                            int stride,
                            uint8_t* data,
                            SharedMemory* shared_memory)
     : data_(data),
       shared_memory_(shared_memory),
       size_(size),
       stride_(stride),
-      capture_time_ms_(0) {
-}
+      capture_time_ms_(0),
+      capturer_id_(DesktopCapturerId::kUnknown) {}
 
 DesktopFrame::~DesktopFrame() {}
 
 void DesktopFrame::CopyPixelsFrom(const uint8_t* src_buffer, int src_stride,
                                   const DesktopRect& dest_rect) {
   RTC_CHECK(DesktopRect::MakeSize(size()).ContainsRect(dest_rect));
 
   uint8_t* dest = GetFrameDataAtPos(dest_rect.top_left());
   for (int y = 0; y < dest_rect.height(); ++y) {
     memcpy(dest, src_buffer, DesktopFrame::kBytesPerPixel * dest_rect.width());
@@ skipping 68 matching lines @@
     : DesktopFrame(size,
                    stride,
                    reinterpret_cast<uint8_t*>(shared_memory->data()),
                    shared_memory) {}
 
 SharedMemoryDesktopFrame::~SharedMemoryDesktopFrame() {
   delete shared_memory_;
 }
 
 }  // namespace webrtc