Revert of Fix issue of localDescription and remoteDescription getter.

LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html

Index: LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html
diff --git a/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html b/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html
index 9aabdf1981bd1f84c135cbc8377cce09866e7e48..f5775886c4618a29cec1b657a2f089c15fe9efd1 100644
--- a/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html
+++ b/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html
@@ -8,7 +8,6 @@
 description("Tests RTCPeerConnection localDescription.");
 
 var pc = null;
-var observation = null;
 
 function requestFailed2()
 {
@@ -39,13 +38,8 @@
 {
     testPassed('requestSucceeded was called.');
 
-    shouldBeTrue('pc.localDescription === sessionDescription');
-    observation = internals.observeGC(pc.localDescription);
-    asyncGC(function() {
-        shouldBeFalse('observation.wasCollected');
-        sessionDescription = new RTCSessionDescription({type:"answer", sdp:"remote"});
-        shouldNotThrow('pc.setLocalDescription(sessionDescription, requestSucceeded2, requestFailed2);');
-    });
+    sessionDescription = new RTCSessionDescription({type:"answer", sdp:"remote"});
+    shouldNotThrow('pc.setLocalDescription(sessionDescription, requestSucceeded2, requestFailed2);');
 }
 
 pc = new webkitRTCPeerConnection(null, null);