Bindings generation emits (more) correct null checking

Source/bindings/dart/DartUtilities.cpp

Index: Source/bindings/dart/DartUtilities.cpp
diff --git a/Source/bindings/dart/DartUtilities.cpp b/Source/bindings/dart/DartUtilities.cpp
index 25a3b2e7c28680a5fd7475307edcdea1a7352d15..921478ca03eb422d8da8173d23ffd60e289c7a5c 100644
--- a/Source/bindings/dart/DartUtilities.cpp
+++ b/Source/bindings/dart/DartUtilities.cpp
@@ -765,6 +765,11 @@ PassRefPtr<WTF::ArrayBufferView> DartUtilities::dartToExternalizedArrayBufferVie
     return dartToArrayBufferViewHelper(array, exception, true);
 }
 
+PassRefPtr<WTF::Int8Array> DartUtilities::dartToInt8ArrayWithNullCheck(Dart_Handle handle, Dart_Handle& exception)
+{
+    return Dart_IsNull(handle) ? nullptr : dartToInt8Array(handle, exception);
+}
+
 PassRefPtr<WTF::Int8Array> DartUtilities::dartToInt8Array(Dart_Handle handle, Dart_Handle& exception)
 {
     RefPtr<ArrayBufferView> view = DartUtilities::dartToArrayBufferView(handle, exception);
@@ -776,12 +781,23 @@ PassRefPtr<WTF::Int8Array> DartUtilities::dartToInt8Array(Dart_Handle handle, Da
     return nullptr;
 }
 
+PassRefPtr<WTF::Int8Array> DartUtilities::dartToInt8ArrayWithNullCheck(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+{
+    Dart_Handle object = Dart_GetNativeArgument(args, idx);
+    return dartToInt8ArrayWithNullCheck(object, exception);
+}
+
 PassRefPtr<WTF::Int8Array> DartUtilities::dartToInt8Array(Dart_NativeArguments args, int idx, Dart_Handle& exception)
 {
     Dart_Handle object = Dart_GetNativeArgument(args, idx);
     return dartToInt8Array(object, exception);
 }
 
+PassRefPtr<WTF::Int32Array> DartUtilities::dartToInt32ArrayWithNullCheck(Dart_Handle handle, Dart_Handle& exception)
+{
+    return Dart_IsNull(handle) ? nullptr : dartToInt32Array(handle, exception);
+}
+
 PassRefPtr<WTF::Int32Array> DartUtilities::dartToInt32Array(Dart_Handle handle, Dart_Handle& exception)
 {
     RefPtr<ArrayBufferView> view = DartUtilities::dartToArrayBufferView(handle, exception);
@@ -793,12 +809,23 @@ PassRefPtr<WTF::Int32Array> DartUtilities::dartToInt32Array(Dart_Handle handle,
     return nullptr;
 }
 
+PassRefPtr<WTF::Int32Array> DartUtilities::dartToInt32ArrayWithNullCheck(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+{
+    Dart_Handle object = Dart_GetNativeArgument(args, idx);
+    return dartToInt32ArrayWithNullCheck(object, exception);
+}
+
 PassRefPtr<WTF::Int32Array> DartUtilities::dartToInt32Array(Dart_NativeArguments args, int idx, Dart_Handle& exception)
 {
     Dart_Handle object = Dart_GetNativeArgument(args, idx);
     return dartToInt32Array(object, exception);
 }
 
+PassRefPtr<WTF::Uint8ClampedArray> DartUtilities::dartToUint8ClampedArrayWithNullCheck(Dart_Handle handle, Dart_Handle& exception)
+{
+    return Dart_IsNull(handle) ? nullptr : dartToUint8ClampedArray(handle, exception);
+}
+
 PassRefPtr<WTF::Uint8ClampedArray> DartUtilities::dartToUint8ClampedArray(Dart_Handle handle, Dart_Handle& exception)
 {
     RefPtr<ArrayBufferView> view = DartUtilities::dartToArrayBufferView(handle, exception);
@@ -810,12 +837,23 @@ PassRefPtr<WTF::Uint8ClampedArray> DartUtilities::dartToUint8ClampedArray(Dart_H
     return nullptr;
 }
 
+PassRefPtr<WTF::Uint8ClampedArray> DartUtilities::dartToUint8ClampedArrayWithNullCheck(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+{
+    Dart_Handle object = Dart_GetNativeArgument(args, idx);
+    return dartToUint8ClampedArrayWithNullCheck(object, exception);
+}
+
 PassRefPtr<WTF::Uint8ClampedArray> DartUtilities::dartToUint8ClampedArray(Dart_NativeArguments args, int idx, Dart_Handle& exception)
 {
     Dart_Handle object = Dart_GetNativeArgument(args, idx);
     return dartToUint8ClampedArray(object, exception);
 }
 
+PassRefPtr<WTF::Uint8Array> DartUtilities::dartToUint8ArrayWithNullCheck(Dart_Handle handle, Dart_Handle& exception)
+{
+    return Dart_IsNull(handle) ? nullptr : dartToUint8Array(handle, exception);
+}
+
 PassRefPtr<WTF::Uint8Array> DartUtilities::dartToUint8Array(Dart_Handle handle, Dart_Handle& exception)
 {
     RefPtr<ArrayBufferView> view = DartUtilities::dartToArrayBufferView(handle, exception);
@@ -827,12 +865,23 @@ PassRefPtr<WTF::Uint8Array> DartUtilities::dartToUint8Array(Dart_Handle handle,
     return nullptr;
 }
 
+PassRefPtr<WTF::Uint8Array> DartUtilities::dartToUint8ArrayWithNullCheck(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+{
+    Dart_Handle object = Dart_GetNativeArgument(args, idx);
+    return dartToUint8ArrayWithNullCheck(object, exception);
+}
+
 PassRefPtr<WTF::Uint8Array> DartUtilities::dartToUint8Array(Dart_NativeArguments args, int idx, Dart_Handle& exception)
 {
     Dart_Handle object = Dart_GetNativeArgument(args, idx);
     return dartToUint8Array(object, exception);
 }
 
+PassRefPtr<WTF::Float32Array> DartUtilities::dartToFloat32ArrayWithNullCheck(Dart_Handle handle, Dart_Handle& exception)
+{
+    return Dart_IsNull(handle) ? nullptr : dartToFloat32Array(handle, exception);
+}
+
 PassRefPtr<WTF::Float32Array> DartUtilities::dartToFloat32Array(Dart_Handle handle, Dart_Handle& exception)
 {
     RefPtr<ArrayBufferView> view = DartUtilities::dartToArrayBufferView(handle, exception);
@@ -844,6 +893,12 @@ PassRefPtr<WTF::Float32Array> DartUtilities::dartToFloat32Array(Dart_Handle hand
     return nullptr;
 }
 
+PassRefPtr<WTF::Float32Array> DartUtilities::dartToFloat32ArrayWithNullCheck(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+{
+    Dart_Handle object = Dart_GetNativeArgument(args, idx);
+    return dartToFloat32ArrayWithNullCheck(object, exception);
+}
+
 PassRefPtr<WTF::Float32Array> DartUtilities::dartToFloat32Array(Dart_NativeArguments args, int idx, Dart_Handle& exception)
 {
     Dart_Handle object = Dart_GetNativeArgument(args, idx);