Implement suspend() and resume() for OfflineAudioContext

third_party/WebKit/Source/modules/webaudio/DeferredTaskHandler.h

Index: third_party/WebKit/Source/modules/webaudio/DeferredTaskHandler.h
diff --git a/third_party/WebKit/Source/modules/webaudio/DeferredTaskHandler.h b/third_party/WebKit/Source/modules/webaudio/DeferredTaskHandler.h
index b145642b82ea96eb3bd9de6e5d1ab3f3de8955c8..afb2e5921cdb03792ad712ece1f12474ed807d40 100644
--- a/third_party/WebKit/Source/modules/webaudio/DeferredTaskHandler.h
+++ b/third_party/WebKit/Source/modules/webaudio/DeferredTaskHandler.h
@@ -110,6 +110,11 @@ public:
     void lock();
     bool tryLock();
     void unlock();
+
+    // This locks the audio render thread for OfflineAudioContext rendering.
+    // CANNOT be used in the real-time audio context.

[Raymond Toy, 2015/10/16 23:32:36]

CANNOT -> MUST NOT.

[hongchan, 2015/10/19 20:08:12]

Done.

+    void offlineLock();
+
 #if ENABLE(ASSERT)
     // Returns true if this thread owns the context's lock.
     bool isGraphOwner();