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

content/renderer/media/media_stream_dispatcher.h

Index: content/renderer/media/media_stream_dispatcher.h
diff --git a/content/renderer/media/media_stream_dispatcher.h b/content/renderer/media/media_stream_dispatcher.h
index 18803c1277de6a49f457159d4f794c91f45b42cc..6312358f53fe1cd28ab1b0792b576a8c9b6c7d50 100644
--- a/content/renderer/media/media_stream_dispatcher.h
+++ b/content/renderer/media/media_stream_dispatcher.h
@@ -75,6 +75,11 @@ class CONTENT_EXPORT MediaStreamDispatcher
   // This method is called when the stream is started successfully.
   void OnStreamStarted(const std::string& label);
 
+  // Get all the media devices of video capture, e.g. webcam. This is the set
+  // of devices that should be suspended when the content frame is no longer
+  // being shown to the user.
+  void GetNonScreenCaptureDevices(StreamDeviceInfoArray* video_array);

[tommi (sloooow) - chröme, 2017/03/29 07:25:10]

I would still prefer to have this function return the array. It's consistent
with the rest of the chromium code.

[braveyao, 2017/03/29 19:37:28]

Done.

+
   // Check if the label is a valid stream.
   virtual bool IsStream(const std::string& label);
   // Get the video session_id given a label. The label identifies a stream.
@@ -90,6 +95,8 @@ class CONTENT_EXPORT MediaStreamDispatcher
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, BasicVideoDevice);
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, TestFailure);
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, CancelGenerateStream);
+  FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest,
+                           GetNonScreenCaptureDevices);
 
   struct Request;