Support for AudioContextOptions latencyHint.

third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html

Index: third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html
diff --git a/third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html b/third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html
index b99613661b2e0f7e334c42117c78d52d57eb59af..d5b1dbdee14a3717fb7b2ebdde63206d80a42e8a 100644
--- a/third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html
+++ b/third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html
@@ -111,6 +111,28 @@
       ).then(done);
     });
 
+    // Task: test online context (4).
+    audit.defineTask('test-online-context-4', function (done) {
+
+      // Create a context and verify that its sampleRate and baseLatency return
+      // valid values whether it's open or closed.
+      shouldNotThrow("context = new AudioContext()");
+      shouldBeGreaterThan("context.sampleRate", "0");
+      shouldBeGreaterThan("context.baseLatency", "0");
+
+      context.close().then(
+        function () {
+          testPassed("context.close() was correctly resolved");
+          shouldBeGreaterThan("context.sampleRate", "0");
+          shouldBeEqualToNumber("context.baseLatency", 0);
+        },
+        function () {
+          testFailed("context.close() was erroneously rejected");
+        }
+      ).then(done);
+
+    });
+
     // Task: test offline context (1).
     audit.defineTask('test-offline-context-1', function (done) {