Remove TRACE_EVENT indirection through blink::Platform

sky/engine/public/platform/WebConvertableToTraceFormat.h

-// 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.
-
-#ifndef SKY_ENGINE_PUBLIC_PLATFORM_WEBCONVERTABLETOTRACEFORMAT_H_
-#define SKY_ENGINE_PUBLIC_PLATFORM_WEBCONVERTABLETOTRACEFORMAT_H_
-
-#include "sky/engine/public/platform/WebPrivatePtr.h"
-#include "sky/engine/public/platform/WebString.h"
-
-namespace blink {
-
-namespace TraceEvent {
-class ConvertableToTraceFormat;
-}
-
-class WebConvertableToTraceFormat {
-public:
-    WebConvertableToTraceFormat() { }
-#if INSIDE_BLINK
-    WebConvertableToTraceFormat(TraceEvent::ConvertableToTraceFormat*);
-#endif
-    ~WebConvertableToTraceFormat() { reset(); }
-
-    BLINK_PLATFORM_EXPORT WebString asTraceFormat() const;
-    BLINK_PLATFORM_EXPORT void assign(const WebConvertableToTraceFormat&);
-    BLINK_PLATFORM_EXPORT void reset();
-
-    WebConvertableToTraceFormat(const WebConvertableToTraceFormat& r) { assign(r); }
-    WebConvertableToTraceFormat& operator=(const WebConvertableToTraceFormat& r)
-    {
-        assign(r);
-        return *this;
-    }
-
-private:
-    WebPrivatePtr<TraceEvent::ConvertableToTraceFormat> m_private;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_PUBLIC_PLATFORM_WEBCONVERTABLETOTRACEFORMAT_H_