Simplify TransferMode and Color types.

sky/engine/core/painting/Rect.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/painting/Rect.h"
 
 #include "sky/engine/core/script/dom_dart_state.h"
 #include "sky/engine/tonic/dart_error.h"
 #include "sky/engine/tonic/dart_value.h"
 #include "base/logging.h"
 
 namespace blink {
 
 // Convert dart_rect._value[0...3] ==> SkRect.
-Rect DartConverter<Rect, void>::FromArgumentsWithNullCheck(
-    Dart_NativeArguments args,
-    int index,
-    Dart_Handle& exception) {
+Rect DartConverter<Rect>::FromArgumentsWithNullCheck(Dart_NativeArguments args,
+                                                     int index,
+                                                     Dart_Handle& exception) {
   Rect result;
   result.is_null = true;
 
   Dart_Handle dart_rect = Dart_GetNativeArgument(args, index);
   DCHECK(!LogIfError(dart_rect));
 
   Dart_Handle value =
       Dart_GetField(dart_rect, DOMDartState::Current()->value_handle());
   if (Dart_IsNull(value))
     return result;
@@ skipping 15 matching lines @@
   for (intptr_t i = 0; i < 4; ++i)
     *dest[i] = data[i];
 
   Dart_TypedDataReleaseData(value);
 
   result.is_null = false;
   return result;
 }
 
 } // namespace blink