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 22ad99468564e6f48001ef98c005a2cc7f49b9e6..89b05e13ccae361256897d756535cf5900875359 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 {
+    "suspended",
+    "running",
+    "closed"
+};
+
 [
     GarbageCollected,
     ActiveDOMObject,
@@ -44,6 +50,9 @@
     // 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.
@@ -73,4 +82,8 @@
     // Channel splitting and merging
     [RaisesException] ChannelSplitterNode createChannelSplitter(optional unsigned long numberOfOutputs);
     [RaisesException] ChannelMergerNode createChannelMerger(optional unsigned long numberOfInputs);
+
+    // Pause/resume
+    [CallWith=ScriptState, ImplementedAs=suspendContext] Promise suspend();
+    [CallWith=ScriptState, ImplementedAs=resumeContext] Promise resume();
 };