Migrate bindings constructors to the new ExceptionState model.

Source/modules/webaudio/DelayNode.cpp

Index: Source/modules/webaudio/DelayNode.cpp
diff --git a/Source/modules/webaudio/DelayNode.cpp b/Source/modules/webaudio/DelayNode.cpp
index 611ae867153095a057f5bcbd698788417c2da5a6..7a8817ee82e2d07530da46c9d099f1a9018e4666 100644
--- a/Source/modules/webaudio/DelayNode.cpp
+++ b/Source/modules/webaudio/DelayNode.cpp
@@ -43,11 +43,9 @@ DelayNode::DelayNode(AudioContext* context, float sampleRate, double maxDelayTim
     if (maxDelayTime <= 0 || maxDelayTime >= maximumAllowedDelayTime) {
         exceptionState.throwDOMException(
             NotSupportedError,

[jochen (gone - plz use gerrit), 2013/12/10 11:41:19]

can you clarify why this is not actually a ctor?

[Mike West, 2013/12/10 11:51:27]

If it's called via `new DelayNode()`, it's a constructor. If it's called via
`AudioContext::createDelayNode` it's not a constructor. The calling context
should determine the message displayed, rather than hard-coding the context at
the throwing site.

See the results in 'LayoutTests/webaudio/delaynode-maxdelaylimit-expected.txt'
for an example.

-            ExceptionMessages::failedToConstruct(
-                "DelayNode",
-                "max delay time (" + String::number(maxDelayTime)
-                + ") must be between 0 and " + String::number(maximumAllowedDelayTime)
-                + ", exclusive."));
+            "max delay time (" + String::number(maxDelayTime)
+            + ") must be between 0 and " + String::number(maximumAllowedDelayTime)
+            + ", exclusive.");
         return;
     }
     m_processor = adoptPtr(new DelayProcessor(context, sampleRate, 1, maxDelayTime));