Bindings generation emits (more) correct null checking

Source/bindings/dart/custom/DartWebGLRenderingContextCustom.cpp

Index: Source/bindings/dart/custom/DartWebGLRenderingContextCustom.cpp
diff --git a/Source/bindings/dart/custom/DartWebGLRenderingContextCustom.cpp b/Source/bindings/dart/custom/DartWebGLRenderingContextCustom.cpp
index dc928be11ebc6922a1ed4163633a6559ff7b31b3..c17728f355ab10fc8bb220d143dd2b1c3c9b74be 100644
--- a/Source/bindings/dart/custom/DartWebGLRenderingContextCustom.cpp
+++ b/Source/bindings/dart/custom/DartWebGLRenderingContextCustom.cpp
@@ -394,7 +394,7 @@ void getAttachedShadersCallback(Dart_NativeArguments args)
     Dart_Handle exception = 0;
     {
         WebGLRenderingContext* context = DartDOMWrapper::receiver<WebGLRenderingContext>(args);
-        WebGLProgram* program = DartWebGLProgram::toNative(Dart_GetNativeArgument(args, 1), exception);
+        WebGLProgram* program = DartWebGLProgram::toNativeWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
         if (exception)
             goto fail;
 
@@ -504,7 +504,7 @@ void getProgramParameterCallback(Dart_NativeArguments args)
     Dart_Handle exception = 0;
     {
         WebGLRenderingContext* context = DartDOMWrapper::receiver<WebGLRenderingContext>(args);
-        WebGLProgram* program = DartWebGLProgram::toNative(Dart_GetNativeArgument(args, 1), exception);
+        WebGLProgram* program = DartWebGLProgram::toNativeWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
         if (exception)
             goto fail;
         int pname = DartUtilities::dartToInt(Dart_GetNativeArgument(args, 2), exception);
@@ -535,7 +535,7 @@ void getShaderParameterCallback(Dart_NativeArguments args)
     Dart_Handle exception = 0;
     {
         WebGLRenderingContext* context = DartDOMWrapper::receiver<WebGLRenderingContext>(args);
-        WebGLShader* shader = DartWebGLShader::toNative(Dart_GetNativeArgument(args, 1), exception);
+        WebGLShader* shader = DartWebGLShader::toNativeWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
         if (exception)
             goto fail;
         int pname = DartUtilities::dartToInt(Dart_GetNativeArgument(args, 2), exception);
@@ -640,7 +640,7 @@ static void vertexAttribAndUniformHelperf(Dart_NativeArguments args, FunctionToC
                 goto fail;
             index = indexParam;
         } else {
-            WebGLUniformLocation* locationParam = DartWebGLUniformLocation::toNative(Dart_GetNativeArgument(args, 1), exception);
+            WebGLUniformLocation* locationParam = DartWebGLUniformLocation::toNativeWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
             if (exception)
                 goto fail;
             location = locationParam;
@@ -698,7 +698,7 @@ static void uniformHelperi(Dart_NativeArguments args, FunctionToCall functionToC
         // * glUniform4iv(GLUniformLocation location, Array data);
         // * glUniform4iv(GLUniformLocation location, Int32Array data);
         WebGLRenderingContext* context = DartDOMWrapper::receiver<WebGLRenderingContext>(args);
-        WebGLUniformLocation* location = DartWebGLUniformLocation::toNative(Dart_GetNativeArgument(args, 1), exception);
+        WebGLUniformLocation* location = DartWebGLUniformLocation::toNativeWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
         if (exception)
             goto fail;
 
@@ -744,7 +744,7 @@ static void uniformMatrixHelper(Dart_NativeArguments args, int matrixSize)
         // * glUniformMatrix4fv(GLint location, GLboolean transpose, Float32Array data);
         //
         WebGLRenderingContext* context = DartDOMWrapper::receiver<WebGLRenderingContext>(args);
-        WebGLUniformLocation* location = DartWebGLUniformLocation::toNative(Dart_GetNativeArgument(args, 1), exception);
+        WebGLUniformLocation* location = DartWebGLUniformLocation::toNativeWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
         if (exception)
             goto fail;
         bool transpose = DartUtilities::dartToBool(Dart_GetNativeArgument(args, 2), exception);