IDL: Add PropertyBag class

Source/bindings/core/v8/PropertyBag.cpp

+// Copyright 2014 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 "config.h"
+#include "bindings/core/v8/PropertyBag.h"
+
+namespace blink {
+
+bool PropertyBag::getInternal(v8::Handle<v8::Value>& v8Value, String& value)
+{
+    TOSTRING_DEFAULT(V8StringResource<>, stringValue, v8Value, false);
+    value = stringValue;
+    return true;
+}
+
+bool PropertyBag::getInternal(v8::Handle<v8::Value>& v8Value, int& value)
+{
+    v8::Local<v8::Int32> v8Int32 = v8Value->ToInt32();
+    if (v8Int32.IsEmpty())
+        return false;
+    value = toInt32(v8Int32);
+    return true;
+}
+
+bool PropertyBag::getInternal(v8::Handle<v8::Value>& v8Value, bool& value)
+{
+    v8::Local<v8::Boolean> v8Boolean = v8Value->ToBoolean();
+    if (v8Boolean.IsEmpty())
+        return false;
+    value = v8Boolean->Value();
+    return true;
+}
+
+bool PropertyBag::getInternal(v8::Handle<v8::Value>& v8Value, double& value)
+{
+    v8::Local<v8::Number> v8Number = v8Value->ToNumber();
+    if (v8Number.IsEmpty())
+        return false;
+    value = v8Number->Value();
+    return true;
+}
+
+} // namespace blink