Add JNI/java wrapper for the file rotating logging class.

talk/app/webrtc/java/src/org/webrtc/CallSessionFileRotatingLogSink.java

Index: talk/app/webrtc/java/src/org/webrtc/CallSessionFileRotatingLogSink.java
diff --git a/talk/app/webrtc/java/src/org/webrtc/MediaSource.java b/talk/app/webrtc/java/src/org/webrtc/CallSessionFileRotatingLogSink.java
similarity index 66%
copy from talk/app/webrtc/java/src/org/webrtc/MediaSource.java
copy to talk/app/webrtc/java/src/org/webrtc/CallSessionFileRotatingLogSink.java
index d79b4628eb79506a69f59ea14651850d6979b20c..f7032a739bdbb24ac93dc000b9a42fb11223cc40 100644
--- a/talk/app/webrtc/java/src/org/webrtc/MediaSource.java
+++ b/talk/app/webrtc/java/src/org/webrtc/CallSessionFileRotatingLogSink.java
@@ -1,6 +1,6 @@
 /*
  * libjingle
- * Copyright 2013 Google Inc.
+ * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -25,31 +25,33 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-
 package org.webrtc;
 
-/** Java wrapper for a C++ MediaSourceInterface. */
-public class MediaSource {
-  /** Tracks MediaSourceInterface.SourceState */
-  public enum State {
-    INITIALIZING, LIVE, ENDED, MUTED
+public class CallSessionFileRotatingLogSink {
+  static {
+    System.loadLibrary("jingle_peerconnection_so");
   }
 
-  final long nativeSource;  // Package-protected for PeerConnectionFactory.
+  private long nativeSink;
 
-  public MediaSource(long nativeSource) {
-    this.nativeSource = nativeSource;
+  public static byte[] getLogData(String dirPath) {
+    return nativeGetLogData(dirPath);
   }
 
-  public State state() {
-    return nativeState(nativeSource);
+  public CallSessionFileRotatingLogSink(
+      String dirPath, int maxFileSize, Logging.Severity severity) {
+    nativeSink = nativeAddSink(dirPath, maxFileSize, severity.ordinal());
   }
 
   public void dispose() {
-    free(nativeSource);
+    if (nativeSink != 0) {
+      nativeDeleteSink(nativeSink);
+      nativeSink = 0;
+    }
   }
 
-  private static native State nativeState(long pointer);
-
-  private static native void free(long nativeSource);
+  private static native long nativeAddSink(
+      String dirPath, int maxFileSize, int severity);
+  private static native void nativeDeleteSink(long nativeSink);
+  private static native byte[] nativeGetLogData(String dirPath);
 }