Refactor stopCapture to be asynchronous in VideoCapturerAndroid.

webrtc/api/android/java/src/org/webrtc/VideoCapturer.java

Index: webrtc/api/android/java/src/org/webrtc/VideoCapturer.java
diff --git a/webrtc/api/android/java/src/org/webrtc/VideoCapturer.java b/webrtc/api/android/java/src/org/webrtc/VideoCapturer.java
index c92f82ac18701694a23dafe62f0855d9199f3432..547ec78996508dbb56b45459a0174a62c0138986 100644
--- a/webrtc/api/android/java/src/org/webrtc/VideoCapturer.java
+++ b/webrtc/api/android/java/src/org/webrtc/VideoCapturer.java
@@ -15,27 +15,26 @@ import android.content.Context;
 import java.util.List;
 
 // Base interface for all VideoCapturers to implement.
+// All events will be fired on the camera thread.
 public interface VideoCapturer {
   // Interface used for providing callbacks to an observer.
   public interface CapturerObserver {
     // Notify if the camera have been started successfully or not.
-    // Called on a Java thread owned by VideoCapturer.
     void onCapturerStarted(boolean success);
+
     void onCapturerStopped();
 
-    // Delivers a captured frame. Called on a Java thread owned by VideoCapturer.
+    // Delivers a captured frame.
     void onByteBufferFrameCaptured(byte[] data, int width, int height, int rotation,
         long timeStamp);
 
-    // Delivers a captured frame in a texture with id |oesTextureId|. Called on a Java thread
-    // owned by VideoCapturer.
+    // Delivers a captured frame in a texture with id |oesTextureId|.
     void onTextureFrameCaptured(
         int width, int height, int oesTextureId, float[] transformMatrix, int rotation,
         long timestamp);
 
     // Requests an output format from the video capturer. Captured frames
     // by the camera will be scaled/or dropped by the video capturer.
-    // Called on a Java thread owned by VideoCapturer.
     void onOutputFormatRequest(int width, int height, int framerate);
   }
 
@@ -160,9 +159,10 @@ public interface VideoCapturer {
   void startCapture(int width, int height, int framerate);
 
   /**
-   * Stop capturing. This function should block until capture is actually stopped.
+   * Stop capturing. No more frames/events will be delivered to the observer when this method
+   * returns.
    */
-  void stopCapture() throws InterruptedException;
+  void stopCapture();
 
   void onOutputFormatRequest(int width, int height, int framerate);