Add more informative messages for DOM exceptions.

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 b26e8ef211495d4199dc63a261dda3df68370255..85a74485e3c149f608848f9c7896789f1ab99cb2 100644
--- a/Source/modules/webaudio/DelayNode.cpp
+++ b/Source/modules/webaudio/DelayNode.cpp
@@ -28,6 +28,7 @@
 
 #include "modules/webaudio/DelayNode.h"
 
+#include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 
@@ -40,7 +41,11 @@ DelayNode::DelayNode(AudioContext* context, float sampleRate, double maxDelayTim
 {
     ScriptWrappable::init(this);
     if (maxDelayTime <= 0 || maxDelayTime >= maximumAllowedDelayTime) {
-        es.throwUninformativeAndGenericDOMException(NotSupportedError);
+        es.throwDOMException(
+            NotSupportedError,
+            ExceptionMessages::failedToConstruct(
+                "DelayNode",
+                "invalid max delay time."));

[Mike West, 2013/09/27 06:44:39]

Same as above.

         return;
     }
     m_processor = adoptPtr(new DelayProcessor(context, sampleRate, 1, maxDelayTime));