[PresentationAPI] Added plumbing for start/joinSession from JS to platform

Source/modules/presentation/PresentationError.cpp

Index: Source/modules/presentation/PresentationError.cpp
diff --git a/Source/modules/presentation/PresentationError.cpp b/Source/modules/presentation/PresentationError.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..f513f21bc1988e43e241d80531b76c734bc6867f
--- /dev/null
+++ b/Source/modules/presentation/PresentationError.cpp
@@ -0,0 +1,32 @@
+// 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 "config.h"
+#include "modules/presentation/PresentationError.h"
+
+#include "core/dom/DOMException.h"
+#include "core/dom/ExceptionCode.h"
+#include "public/platform/modules/presentation/WebPresentationError.h"
+#include "wtf/OwnPtr.h"
+
+namespace blink {
+
+// static
+PassRefPtrWillBeRawPtr<DOMException> PresentationError::take(WebPresentationError* errorRaw)
+{
+    ASSERT(errorRaw);
+    OwnPtr<WebPresentationError> error = adoptPtr(errorRaw);
+
+    // TODO(avayvod): figure out the mapping between WebPresentationError and
+    // DOMException error codes.
+    return DOMException::create(InvalidAccessError, error->message);
+}
+
+// static
+void PresentationError::dispose(WebPresentationError* error)
+{
+    delete error;
+}
+
+} // namespace blink