VideoCapturerAndroid: Add possibility to request a new resolution from the video adapter.

talk/app/webrtc/androidvideocapturer.cc

Index: talk/app/webrtc/androidvideocapturer.cc
diff --git a/talk/app/webrtc/androidvideocapturer.cc b/talk/app/webrtc/androidvideocapturer.cc
index 2c9c0310240d6f7553e304a7eed6001d1b9f3fa6..65f883ef9d04f0a57bda6099000932513b6c3c94 100644
--- a/talk/app/webrtc/androidvideocapturer.cc
+++ b/talk/app/webrtc/androidvideocapturer.cc
@@ -242,4 +242,13 @@ void AndroidVideoCapturer::OnIncomingFrame(void* frame_data,
   SignalFrameCaptured(this, frame_factory_->GetCapturedFrame());
 }
 
+void AndroidVideoCapturer::OnOutputFormatRequest(
+    int width, int height, int fps) {
+  CHECK(thread_checker_.CalledOnValidThread());
+  const cricket::VideoFormat& current = video_adapter()->output_format();
+  cricket::VideoFormat format(
+      width, height, cricket::VideoFormat::FpsToInterval(fps), current.fourcc);
+  video_adapter()->OnOutputFormatRequest(format);
+}
+
 }  // namespace webrtc