VideoCapturerAndroid: Fix threading issues

talk/app/webrtc/java/jni/androidvideocapturer_jni.cc

Index: talk/app/webrtc/java/jni/androidvideocapturer_jni.cc
diff --git a/talk/app/webrtc/java/jni/androidvideocapturer_jni.cc b/talk/app/webrtc/java/jni/androidvideocapturer_jni.cc
index 69c350ab5e5b71e2d8891854abb2c3e0876c271c..74a9372d866e1d8042f478bedc46aeacf4f50814 100644
--- a/talk/app/webrtc/java/jni/androidvideocapturer_jni.cc
+++ b/talk/app/webrtc/java/jni/androidvideocapturer_jni.cc
@@ -88,6 +88,10 @@ bool AndroidVideoCapturerJni::Init(jstring device_name) {
 
 AndroidVideoCapturerJni::~AndroidVideoCapturerJni() {
   LOG(LS_INFO) << "AndroidVideoCapturerJni dtor";
+  jni()->CallVoidMethod(
+      *j_capturer_global_,
+      GetMethodID(jni(), *j_video_capturer_class_, "release", "()V"));
+  CHECK_EXCEPTION(jni()) << "error during VideoCapturerAndroid.release()";
 }
 
 void AndroidVideoCapturerJni::Start(int width, int height, int framerate,