Implement suspend/resume for AudioContext

Source/modules/webaudio/DefaultAudioDestinationNode.cpp

Index: Source/modules/webaudio/DefaultAudioDestinationNode.cpp
diff --git a/Source/modules/webaudio/DefaultAudioDestinationNode.cpp b/Source/modules/webaudio/DefaultAudioDestinationNode.cpp
index 27436a24499f8337aa8835d4bd330973a68f5f57..73624867b5299f2f8619e5b785813018d6b5a523 100644
--- a/Source/modules/webaudio/DefaultAudioDestinationNode.cpp
+++ b/Source/modules/webaudio/DefaultAudioDestinationNode.cpp
@@ -94,6 +94,13 @@ void DefaultAudioDestinationNode::startRendering()
         m_destination->start();
 }
 
+void DefaultAudioDestinationNode::stop()
+{
+    ASSERT(isInitialized());
+    if (isInitialized())
+        m_destination->stop();
+}

[haraken, 2014/10/15 15:36:26]

Can we add an ASSERT to verify that start() and stop() are balanced? (i.e.,
start() is not called twice in a row etc)

[Raymond Toy, 2014/10/15 19:50:50]

Added a check that destination is playing when calling stop() and destination is
not playing when calling start().

+
 unsigned long DefaultAudioDestinationNode::maxChannelCount() const
 {
     return AudioDestination::maxChannelCount();