Implement suspend() and resume() for OfflineAudioContext

LayoutTests/webaudio/audiocontext-suspend-resume.html

Index: LayoutTests/webaudio/audiocontext-suspend-resume.html
diff --git a/LayoutTests/webaudio/audiocontext-suspend-resume.html b/LayoutTests/webaudio/audiocontext-suspend-resume.html
index 99190ab92e38345c24e308359be7e9f3b2564470..f24056d6c45eb6d20e084bd7ddaa4ab5045cfa35 100644
--- a/LayoutTests/webaudio/audiocontext-suspend-resume.html
+++ b/LayoutTests/webaudio/audiocontext-suspend-resume.html
@@ -57,12 +57,12 @@
       p1.then(
         handlePromise(testFailed, "offlineContext.suspend() should have been rejected for an offline context"),
         function (e) {
-          if (e.name === "InvalidAccessError") {
+          if (e.name === "TypeError") {
             testPassed(
               "offlineContext.suspend() was correctly rejected: " + e);
           } else {
             testFailed(
-              "offlineContext.suspend() was correctly rejected but expected InvalidAccessError, not: " + e);
+              "offlineContext.suspend() was correctly rejected but expected TypeError, not: " + e);
           }
         }
       ).then(done);
@@ -83,12 +83,12 @@
       p2.then(
         handlePromise(testFailed, "offlineContext.resume() should have been rejected for an offline context"),
         function (e) {
-          if (e.name === "InvalidAccessError") {
+          if (e.name === "InvalidStateError") {
             testPassed(
               "offlineContext.resume() was correctly rejected: " + e);
           } else {
             testFailed(
-              "offlineContext.resume() was correctly rejected but expected InvalidAccessError, not: " + e);
+              "offlineContext.resume() was correctly rejected but expected InvalidStateError, not: " + e);
           }
         }
       ).then(done);
@@ -107,13 +107,13 @@
         shouldBeEqualToString("offlineContext.state", "closed");
 
         // suspend() should be rejected on a closed context.
-        offlineContext.suspend().then(
+        offlineContext.suspend(1.0).then(

[Raymond Toy, 2015/05/28 16:37:34]

Why 1.0 and not durationInSeconds?

This seems to be a corner case too.  If you want to suspend at time 1 and the
duration is 1 sec, what should happen? I think maybe suspend should be handled
first.  When resumed, the context is then closed.

           handlePromise(testFailed, "offlineContext.suspend() on a closed context not rejected"),
           function (e) {
-            if (e.name === "InvalidAccessError") {
+            if (e.name === "InvalidStateError") {
               testPassed("offlineContext.suspend() on a closed context rejected: " + e);
             } else {
-              testFailed("offlineContext.suspend() on a closed context rejected but expected InvalidAccessError, not: " + e);
+              testFailed("offlineContext.suspend() on a closed context rejected but expected InvalidStateError, not: " + e);
             }
           }
         ).then(function () {
@@ -121,10 +121,10 @@
           offlineContext.resume().then(
             handlePromise(testFailed, "offlineContext.resume() on a closed context not rejected"),
             function (e) {
-              if (e.name === "InvalidAccessError") {
+              if (e.name === "InvalidStateError") {
                 testPassed("offlineContext.resume() on a closed context rejected: " + e);
               } else {
-                testFailed("offlineContext.resume() on a closed context rejected but expected InvalidAccessError, not: " + e);
+                testFailed("offlineContext.resume() on a closed context rejected but expected InvalidStateError, not: " + e);
               }
             }
           ).then(done);