Mojo JS Bindings: revert the Mojo handle toString() method

mojo/public/js/core_unittests.js

Index: mojo/public/js/core_unittests.js
diff --git a/mojo/public/js/core_unittests.js b/mojo/public/js/core_unittests.js
index 44f24d32ed4a273cdf08ec7350db47f856b96bff..eaeaa4f74aeb9ada6e199bb3408fb89fcec1d8ff 100644
--- a/mojo/public/js/core_unittests.js
+++ b/mojo/public/js/core_unittests.js
@@ -15,7 +15,6 @@ define([
   runWithDataPipe(testReadAndWriteDataPipe);
   runWithDataPipeWithOptions(testNop);
   runWithDataPipeWithOptions(testReadAndWriteDataPipe);
-  testHandleToString();
   gc.collectGarbage();  // should not crash
   this.result = "PASS";
 
@@ -126,18 +125,4 @@ define([
       expect(memory[i]).toBe((i * i) & 0xFF);
   }
 
-  function testHandleToString() {
-    var pipe = core.createDataPipe();
-    expect(pipe.consumerHandle.toString).toBeDefined();
-
-    var openHandleRE = /^\[mojo\:\:Handle \d+\]$/ // e.g. "[mojo::Handle 123]"
-    var openHandleString = pipe.consumerHandle.toString();
-    expect(openHandleString.match(openHandleRE)[0]).toEqual(openHandleString);
-
-    expect(core.close(pipe.producerHandle)).toBe(core.RESULT_OK);
-    expect(core.close(pipe.consumerHandle)).toBe(core.RESULT_OK);
-
-    expect(pipe.consumerHandle.toString()).toEqual("[mojo::Handle null]");
-  }
-
 });