[bindings] Introduce ScriptValue.to<T> to convert to native values.

Source/modules/indexeddb/IDBKeyRange.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 21 matching lines @@
 #include "core/dom/ExceptionCode.h"
 #include "modules/indexeddb/IDBDatabase.h"
 
 namespace blink {
 
 IDBKeyRange* IDBKeyRange::fromScriptValue(ExecutionContext* context, const ScriptValue& value, ExceptionState& exceptionState)
 {
     if (value.isUndefined() || value.isNull())
         return 0;
 
-    IDBKeyRange* range = scriptValueToIDBKeyRange(toIsolate(context), value);
+    IDBKeyRange* range = value.to<IDBKeyRange*>(exceptionState);
     if (range)
         return range;
 
-    IDBKey* key = scriptValueToIDBKey(toIsolate(context), value);
+    IDBKey* key = value.to<IDBKey*>(exceptionState);
     if (!key || !key->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return 0;
     }
 
     return new IDBKeyRange(key, key, LowerBoundClosed, UpperBoundClosed);
 }
 
 IDBKeyRange::IDBKeyRange(IDBKey* lower, IDBKey* upper, LowerBoundType lowerType, UpperBoundType upperType)
     : m_lower(lower)
@@ skipping 24 matching lines @@
     if (!key || !key->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return 0;
     }
 
     return IDBKeyRange::create(key, key, LowerBoundClosed, UpperBoundClosed);
 }
 
 IDBKeyRange* IDBKeyRange::only(ExecutionContext* context, const ScriptValue& keyValue, ExceptionState& exceptionState)
 {
-    IDBKey* key = scriptValueToIDBKey(toIsolate(context), keyValue);
+    IDBKey* key = keyValue.to<IDBKey*>(exceptionState);
     if (!key || !key->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return 0;
     }
 
     return IDBKeyRange::create(key, key, LowerBoundClosed, UpperBoundClosed);
 }
 
 IDBKeyRange* IDBKeyRange::lowerBound(ExecutionContext* context, const ScriptValue& boundValue, bool open, ExceptionState& exceptionState)
 {
-    IDBKey* bound = scriptValueToIDBKey(toIsolate(context), boundValue);
+    IDBKey* bound = boundValue.to<IDBKey*>(exceptionState);
     if (!bound || !bound->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return 0;
     }
 
     return IDBKeyRange::create(bound, 0, open ? LowerBoundOpen : LowerBoundClosed, UpperBoundOpen);
 }
 
 IDBKeyRange* IDBKeyRange::upperBound(ExecutionContext* context, const ScriptValue& boundValue, bool open, ExceptionState& exceptionState)
 {
-    IDBKey* bound = scriptValueToIDBKey(toIsolate(context), boundValue);
+    IDBKey* bound = boundValue.to<IDBKey*>(exceptionState);
     if (!bound || !bound->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return 0;
     }
 
     return IDBKeyRange::create(0, bound, LowerBoundOpen, open ? UpperBoundOpen : UpperBoundClosed);
 }
 
 IDBKeyRange* IDBKeyRange::bound(ExecutionContext* context, const ScriptValue& lowerValue, const ScriptValue& upperValue, bool lowerOpen, bool upperOpen, ExceptionState& exceptionState)
 {
-    IDBKey* lower = scriptValueToIDBKey(toIsolate(context), lowerValue);
-    IDBKey* upper = scriptValueToIDBKey(toIsolate(context), upperValue);
+    IDBKey* lower = lowerValue.to<IDBKey*>(exceptionState);
+    IDBKey* upper = upperValue.to<IDBKey*>(exceptionState);
 
     if (!lower || !lower->isValid() || !upper || !upper->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return 0;
     }
     if (upper->isLessThan(lower)) {
         exceptionState.throwDOMException(DataError, "The lower key is greater than the upper key.");
         return 0;
     }
     if (upper->isEqual(lower) && (lowerOpen || upperOpen)) {
         exceptionState.throwDOMException(DataError, "The lower key and upper key are equal and one of the bounds is open.");
         return 0;
     }
 
     return IDBKeyRange::create(lower, upper, lowerOpen ? LowerBoundOpen : LowerBoundClosed, upperOpen ? UpperBoundOpen : UpperBoundClosed);
 }
 
 } // namespace blink