Implement suspend() and resume() for OfflineAudioContext

LayoutTests/webaudio/offlineaudiocontext-suspend-resume-eventhandler-expected.txt

Index: LayoutTests/webaudio/offlineaudiocontext-suspend-resume-eventhandler-expected.txt
diff --git a/LayoutTests/webaudio/offlineaudiocontext-suspend-resume-eventhandler-expected.txt b/LayoutTests/webaudio/offlineaudiocontext-suspend-resume-eventhandler-expected.txt
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index 0000000000000000000000000000000000000000..6fe44304d3ca67cadb9d80ee57231a0a0a279ba7
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+++ b/LayoutTests/webaudio/offlineaudiocontext-suspend-resume-eventhandler-expected.txt
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+Test event handler callback from OfflineAudioContext resume/suspend.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS context.currentTime is equal to 0.09868480725623582.
+PASS context.currentTime is equal to 0.19736961451247165.
+PASS context.currentTime is equal to 0.2960544217687075.
+PASS context.currentTime is equal to 0.3947392290249433.
+PASS context.currentTime is equal to 0.49342403628117915.
+PASS context.currentTime is equal to 0.592108843537415.
+PASS context.currentTime is equal to 0.6907936507936508.
+PASS context.currentTime is equal to 0.7894784580498866.
+PASS context.currentTime is equal to 0.8881632653061224.
+PASS context.currentTime is equal to 0.9868480725623583.
+PASS context.currentTime is equal to 1.0855328798185941.
+PASS context.currentTime is equal to 1.18421768707483.
+PASS context.currentTime is equal to 1.2829024943310658.
+PASS context.currentTime is equal to 1.3815873015873017.
+PASS context.currentTime is equal to 1.4802721088435373.
+PASS context.currentTime is equal to 1.5789569160997732.
+PASS context.currentTime is equal to 1.677641723356009.
+PASS context.currentTime is equal to 1.7763265306122449.
+PASS context.currentTime is equal to 1.8750113378684807.
+PASS context.currentTime is equal to 1.9736961451247166.
+PASS context.suspend(scheduledSuspendTime) rejected correctly. (with InvalidStateError: cannot schedule a suspend beyond the total render duration).
+PASS context.state is equal to closed.
+PASS successfullyParsed is true
+
+TEST COMPLETE
+