Cleanup dart to string conversions.

Source/WebCore/bindings/dart/custom/DartDOMStringMapCustom.cpp

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "config.h"
 #include "DartDOMStringMap.h"
 
 namespace WebCore {
 
 namespace DartDOMStringMapInternal {
 
 static void containsKeyCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMStringMap* receiver = DartDOMWrapper::receiver<DOMStringMap>(args);
 
-        ParameterAdapter<String> key(Dart_GetNativeArgument(args, 1));
-        if (!key.conversionSuccessful()) {
-            exception = key.exception();
+        DartStringAdapter key = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
 
         Dart_SetReturnValue(args, DartUtilities::boolToDart(receiver->contains(key)));
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 static void itemCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMStringMap* receiver = DartDOMWrapper::receiver<DOMStringMap>(args);
 
-        ParameterAdapter<String> key(Dart_GetNativeArgument(args, 1));
-        if (!key.conversionSuccessful()) {
-            exception = key.exception();
+        DartStringAdapter key = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
 
         Dart_SetReturnValue(args, DartUtilities::stringToDart(receiver->item(key)));
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 static void setItemCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMStringMap* receiver = DartDOMWrapper::receiver<DOMStringMap>(args);
 
-        ParameterAdapter<String> key(Dart_GetNativeArgument(args, 1));
-        if (!key.conversionSuccessful()) {
-            exception = key.exception();
+        DartStringAdapter key = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
 
-        ParameterAdapter<String> value(Dart_GetNativeArgument(args, 2));
-        if (!value.conversionSuccessful()) {
-            exception = value.exception();
+        DartStringAdapter value = DartUtilities::dartToString(Dart_GetNativeArgument(args, 2), exception);
+        if (exception)
             goto fail;
-        }
 
         ExceptionCode ec = 0;
         receiver->setItem(key, value, ec);
         if (UNLIKELY(ec)) {
             exception = DartDOMWrapper::exceptionCodeToDartException(ec);
             goto fail;
         }
 
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 static void removeCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMStringMap* receiver = DartDOMWrapper::receiver<DOMStringMap>(args);
 
-        ParameterAdapter<String> key(Dart_GetNativeArgument(args, 1));
-        if (!key.conversionSuccessful()) {
-            exception = key.exception();
+        DartStringAdapter key = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
 
         String value = receiver->item(key);
 
         ExceptionCode ec = 0;
         receiver->deleteItem(key, ec);
         if (UNLIKELY(ec)) {
             exception = DartDOMWrapper::exceptionCodeToDartException(ec);
             goto fail;
         }
 
@@ skipping 29 matching lines @@
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 }
 
 Dart_NativeFunction DartDOMStringMap::resolver(Dart_Handle nameHandle, int argumentCount)
 {
-    String name = DartUtilities::dartStringToString(nameHandle);
+    String name = DartUtilities::toString(nameHandle);
 
     if (argumentCount == 2 && name == "DOMStringMap_containsKey_Callback")
         return DartDOMStringMapInternal::containsKeyCallback;
     if (argumentCount == 2 && name == "DOMStringMap_item_Callback")
         return DartDOMStringMapInternal::itemCallback;
     if (argumentCount == 3 && name == "DOMStringMap_setItem_Callback")
         return DartDOMStringMapInternal::setItemCallback;
     if (argumentCount == 2 && name == "DOMStringMap_remove_Callback")
         return DartDOMStringMapInternal::removeCallback;
     if (argumentCount == 1 && name == "DOMStringMap_getKeys_Callback")
         return DartDOMStringMapInternal::getKeysCallback;
 
     return 0;
 }
 
 const char* const DartDOMStringMap::dartImplementationClassName = "DOMStringMapImplementation";
 }