Fix incorrect error message for ScriptProcessorNode

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

Index: third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.cpp b/third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.cpp
index d3a798af9e5259782f073136a79d5f42de42b457..9ab92d775046d040fcb59be3d77815fedb091fd3 100644
--- a/third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.cpp
@@ -380,7 +380,7 @@ ScriptProcessorNode* ScriptProcessorNode::create(
     if (numberOfOutputChannels > BaseAudioContext::maxNumberOfChannels()) {
         exceptionState.throwDOMException(
             IndexSizeError,
-            "number of output channels (" + String::number(numberOfInputChannels)
+            "number of output channels (" + String::number(numberOfOutputChannels)
             + ") exceeds maximum ("
             + String::number(BaseAudioContext::maxNumberOfChannels()) + ").");
         return nullptr;