Generate a bit less code to handle failed arity checks.

Source/bindings/v8/custom/V8CryptoCustom.cpp

Index: Source/bindings/v8/custom/V8CryptoCustom.cpp
diff --git a/Source/bindings/v8/custom/V8CryptoCustom.cpp b/Source/bindings/v8/custom/V8CryptoCustom.cpp
index 7abea6ff09c507804054fc10101871e2ae6bb7b8..e1a6f1e246fd07bd3c419d799f8120da00ffad3f 100644
--- a/Source/bindings/v8/custom/V8CryptoCustom.cpp
+++ b/Source/bindings/v8/custom/V8CryptoCustom.cpp
@@ -25,7 +25,6 @@
 #include "config.h"
 #include "V8Crypto.h"
 
-#include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/V8Binding.h"
 #include "bindings/v8/V8Utilities.h"
@@ -41,22 +40,21 @@ namespace WebCore {
 //   * Must be threadsafe
 void V8Crypto::getRandomValuesMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
+    ExceptionState exceptionState(ExceptionState::ExecutionContext, "getRandomValues", "Crypto", info.Holder(), info.GetIsolate());

[Mike West, 2013/12/05 11:48:59]

These custom bindings changes look reasonable, thank you!

     if (info.Length() < 1) {
-        throwTypeError(ExceptionMessages::failedToExecute("getRandomValues", "Crypto", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
+        exceptionState.notEnoughArguments(1, info.Length());
         return;
     }
 
     v8::Handle<v8::Value> buffer = info[0];
     if (!V8ArrayBufferView::hasInstance(buffer, info.GetIsolate(), worldType(info.GetIsolate()))) {
-        throwTypeError("First argument is not an ArrayBufferView", info.GetIsolate());
-        return;
-    }
+        exceptionState.throwTypeError("First argument is not an ArrayBufferView");
+    } else {
+        ArrayBufferView* arrayBufferView = V8ArrayBufferView::toNative(v8::Handle<v8::Object>::Cast(buffer));
+        ASSERT(arrayBufferView);
 
-    ArrayBufferView* arrayBufferView = V8ArrayBufferView::toNative(v8::Handle<v8::Object>::Cast(buffer));
-    ASSERT(arrayBufferView);
-
-    ExceptionState exceptionState(ExceptionState::ExecutionContext, "getRandomValues", "Crypto", info.Holder(), info.GetIsolate());
-    Crypto::getRandomValues(arrayBufferView, exceptionState);
+        Crypto::getRandomValues(arrayBufferView, exceptionState);
+    }
 
     if (exceptionState.throwIfNeeded())
         return;