[compositorworker] Register compositor proxies with proxy client

third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/compositor-proxy-postmessage.html

Index: third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/compositor-proxy-postmessage.html
diff --git a/third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/compositor-proxy-postmessage.html b/third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/compositor-proxy-postmessage.html
index bd57b71b4f255acce0401a1c35b340ed967ecc3b..ca952ec9735bb3d2d34f98879692ef1ea2f90b0e 100644
--- a/third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/compositor-proxy-postmessage.html
+++ b/third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/compositor-proxy-postmessage.html
@@ -7,7 +7,8 @@
 var test = async_test("This test checks that an element's compositor proxy can be sent from the main thread to the compositor thread.");

[jbroman, 2016/06/09 21:13:47]

nit: please update the test description (e.g. "to the compositor thread and back
again").

[majidvp, 2016/06/10 15:33:47]

Done.

 
 var lastAttribute = '';
-function checkResponse(opacity, transform) {
+function checkResponse(proxy, opacity, transform) {
+    assert_equals(typeof proxy, 'object');
     assert_true(opacity || transform);
     assert_not_equals(opacity, transform);
     var currentAttribute = opacity ? 'opacity' : 'transform';
@@ -22,7 +23,7 @@ function checkResponse(opacity, transform) {
 function processMessage(msg) {
     var message = msg.data;
     assert_equals('response', message.type);
-    checkResponse(message.opacity, message.transform);
+    checkResponse(message.proxy, message.opacity, message.transform);
 }
 
 var first = new CompositorWorker('resources/proxy-echo.js');