Move the exception logic to the AudioNode creator

third_party/WebKit/Source/modules/webaudio/StereoPannerNode.cpp

Index: third_party/WebKit/Source/modules/webaudio/StereoPannerNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.cpp b/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.cpp
index de4c8ceb38b68b67ce5006af59a475d023f635d4..5c1caabf3adf65ed03f0939256908bf3513c1ca6 100644
--- a/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.cpp
@@ -134,16 +134,23 @@ void StereoPannerHandler::setChannelCountMode(const String& mode, ExceptionState
 
 // ----------------------------------------------------------------
 
-StereoPannerNode::StereoPannerNode(AbstractAudioContext& context, float sampleRate)
+StereoPannerNode::StereoPannerNode(AbstractAudioContext& context)
     : AudioNode(context)
     , m_pan(AudioParam::create(context, ParamTypeStereoPannerPan, 0))
 {
-    setHandler(StereoPannerHandler::create(*this, sampleRate, m_pan->handler()));
+    setHandler(StereoPannerHandler::create(*this, context.sampleRate(), m_pan->handler()));

[hongchan, 2016/05/13 01:20:13]

80 cols.

 }
 
-StereoPannerNode* StereoPannerNode::create(AbstractAudioContext& context, float sampleRate)
+StereoPannerNode* StereoPannerNode::create(AbstractAudioContext& context, ExceptionState& exceptionState)

[hongchan, 2016/05/13 01:20:13]

Let's wrap arguments.

 {
-    return new StereoPannerNode(context, sampleRate);
+    ASSERT(isMainThread());

[hongchan, 2016/05/13 01:20:13]

DCHECK.

[Raymond Toy, 2016/05/20 23:12:01]

Done.

+
+    if (context.isContextClosed()) {
+        context.throwExceptionForClosedState(exceptionState);
+        return nullptr;
+    }
+
+    return new StereoPannerNode(context);
 }
 
 DEFINE_TRACE(StereoPannerNode)