Implement suspend/resume for AudioContext

Source/modules/webaudio/AudioContext.idl

Index: Source/modules/webaudio/AudioContext.idl
diff --git a/Source/modules/webaudio/AudioContext.idl b/Source/modules/webaudio/AudioContext.idl
index b0398cceb78b0cab869e3e9189e0f2355ed625c6..7a4f6d5db05e95d04cb33f65587f5f1a693b4a55 100644
--- a/Source/modules/webaudio/AudioContext.idl
+++ b/Source/modules/webaudio/AudioContext.idl
@@ -23,6 +23,12 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+enum AudioContextState {
+    "paused",
+    "running",
+    "released"
+};
+
 [
     GarbageCollected,
     ActiveDOMObject,
@@ -45,6 +51,9 @@
     // All panning is relative to this listener.
     readonly attribute AudioListener listener;
 
+    // Current state of the AudioContext
+    readonly attribute AudioContextState state;
+
     [RaisesException] AudioBuffer createBuffer(unsigned long numberOfChannels, unsigned long numberOfFrames, float sampleRate);
 
     // Asynchronous audio file data decoding.
@@ -75,6 +84,10 @@
     [RaisesException] ChannelSplitterNode createChannelSplitter(optional unsigned long numberOfOutputs);
     [RaisesException] ChannelMergerNode createChannelMerger(optional unsigned long numberOfInputs);
 
+    // Pause/resume
+    [RaisesException, ImplementedAs=suspendContext] void suspend();
+    [CallWith=ScriptState, ImplementedAs=resumeContext] Promise resume();
+
     // Offline rendering
     // void prepareOfflineBufferRendering(unsigned long numberOfChannels, unsigned long numberOfFrames, float sampleRate);
     attribute EventHandler oncomplete;