Add frame refresh to VideoCaptureDevice, and buffer pool resurrection.

media/capture/video/video_capture_device.cc

Index: media/capture/video/video_capture_device.cc
diff --git a/media/capture/video/video_capture_device.cc b/media/capture/video/video_capture_device.cc
index f3fc56553c08f5a15f097104220e4d690e2858c0..731acd15698a42a7b10b72b81d9f978ac6a6c27f 100644
--- a/media/capture/video/video_capture_device.cc
+++ b/media/capture/video/video_capture_device.cc
@@ -6,6 +6,7 @@
 
 #include "base/command_line.h"
 #include "base/i18n/timezone.h"
+#include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
@@ -145,6 +146,10 @@ VideoCaptureDevice::Client::Buffer::~Buffer() {
 VideoCaptureDevice::~VideoCaptureDevice() {
 }
 
+void VideoCaptureDevice::RequestRefreshFrame() {
+  DVLOG(2) << "Ignoring request for refresh frame (no implementation).";

[emircan, 2016/03/25 22:44:24]

|NOTIMPLEMENTED();| ?

[miu, 2016/03/25 23:13:48]

This wouldn't be appropriate for normal webcams.  They all do not need to do
anything since they provide constant frame-rate video.

No longer applicable, since I made the no-op default explicit in the header file
(per your other comment).

+}
+
 PowerLineFrequency VideoCaptureDevice::GetPowerLineFrequencyForLocation()
     const {
   const std::string current_country = base::CountryCodeForCurrentTimezone();