Moved the TraceUploader to chrome/ and abstracted it for alternative new upload destinations.

content/public/browser/tracing_delegate.h

+// 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.
+
+#ifndef CONTENT_BROWSER_TRACING_TRACING_DELEGATE_H_
+#define CONTENT_BROWSER_TRACING_TRACING_DELEGATE_H_
+
+#include "base/memory/scoped_ptr.h"
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+namespace content {
+class TraceUploader;
+
+// This can be implemented by the embedder to provide functionality for the
+// about://tracing WebUI.
+class TracingDelegate {
+ public:
+  virtual ~TracingDelegate() {}
+
+  // Provide trace uploading functionality; see trace_uploader.h.
+  virtual scoped_ptr<TraceUploader> GetTraceUploader(
+      net::URLRequestContextGetter* request_context) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_TRACING_TRACING_DELEGATE_H_