Android: not to pause screen capture when Chrome is put to background

content/renderer/media/media_stream_dispatcher.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 "content/renderer/media/media_stream_dispatcher.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "content/common/media/media_stream_messages.h"
@@ skipping 157 matching lines @@
   Send(new MediaStreamHostMsg_CloseDevice(routing_id(), label));
 }
 
 void MediaStreamDispatcher::OnStreamStarted(const std::string& label) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DVLOG(1) << "MediaStreamDispatcher::OnStreamStarted(" << label << ")";
 
   Send(new MediaStreamHostMsg_StreamStarted(label));
 }
 
+void MediaStreamDispatcher::GetVideoCaptureDevices(
+    StreamDeviceInfoArray& video_array) {

[tommi (sloooow) - chröme, 2017/03/21 09:21:17]

see comment in header for style issue

[braveyao, 2017/03/22 00:45:32]

Done.

+  for (const auto& stream_it : label_stream_map_) {
+    for (const auto& device_it : stream_it.second.video_array) {

[tommi (sloooow) - chröme, 2017/03/21 09:21:17]

|device_it| is misleading, since the variable is not an iterator but rather the
actual item in the array.

[braveyao, 2017/03/22 00:45:32]

Done.

+      if (device_it.device.type == MEDIA_DEVICE_VIDEO_CAPTURE)
+        video_array.push_back(device_it);
+    }
+  }
+}
+
 void MediaStreamDispatcher::OnDestruct() {
   // Do not self-destruct. UserMediaClientImpl owns |this|.
 }
 
 bool MediaStreamDispatcher::Send(IPC::Message* message) {
   if (!RenderThread::Get()) {
     delete message;
     return false;
   }
 
@@ skipping 169 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   LabelStreamMap::iterator it = label_stream_map_.find(label);
   if (it == label_stream_map_.end() ||
       it->second.video_array.size() <= static_cast<size_t>(index)) {
     return StreamDeviceInfo::kNoId;
   }
   return it->second.video_array[index].session_id;
 }
 
 }  // namespace content