Add helper functions for throwing arity-related TypeErrors

Source/bindings/v8/V8Binding.cpp

Index: Source/bindings/v8/V8Binding.cpp
diff --git a/Source/bindings/v8/V8Binding.cpp b/Source/bindings/v8/V8Binding.cpp
index 1be9f2596dc72aaadbcefc2ad136217f3b84210a..f60bf72cd90052701973a04d8b6ec0af20e1b51e 100644
--- a/Source/bindings/v8/V8Binding.cpp
+++ b/Source/bindings/v8/V8Binding.cpp
@@ -82,6 +82,22 @@ v8::Handle<v8::Value> throwTypeError(const String& message, v8::Isolate* isolate
     return V8ThrowException::throwTypeError(message, isolate);
 }
 
+void throwArityTypeErrorForMethod(const char* method, const char* type, unsigned expected, unsigned providedLeastNumMandatoryParams, v8::Isolate* isolate)
+{
+    throwTypeError(ExceptionMessages::failedToExecute(method, type, ExceptionMessages::notEnoughArguments(expected, providedLeastNumMandatoryParams)), isolate);
+}
+
+void throwArityTypeErrorForConstructor(const char* type, unsigned expected, unsigned providedLeastNumMandatoryParams, v8::Isolate* isolate)
+{
+    throwTypeError(ExceptionMessages::failedToConstruct(type, ExceptionMessages::notEnoughArguments(expected, providedLeastNumMandatoryParams)), isolate);
+}
+
+void throwArityTypeError(ExceptionState& exceptionState, unsigned expected, unsigned providedLeastNumMandatoryParams)
+{
+    exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(expected, providedLeastNumMandatoryParams));
+    exceptionState.throwIfNeeded();
+}
+
 class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
     virtual void* Allocate(size_t size) OVERRIDE
     {