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

content/public/browser/trace_uploader.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_PUBLIC_BROWSER_TRACE_UPLOADER_H_
+#define CONTENT_PUBLIC_BROWSER_TRACE_UPLOADER_H_
+
+#include "base/callback.h"
+
+namespace content {
+
+// Used to implement a trace upload service for use in about://tracing,
+// which gets requested through the TracingDelegate.
+class TraceUploader {
+ public:
+  // This should be called when the tracing is complete.
+  // The bool denotes success or failure, the string is feedback
+  // to show in the Tracing UI.
+  typedef base::Callback<void(bool, const std::string&)> UploadDoneCallback;
+  // Call this to update the progress UI with the current bytes uploaded,
+  // as well as the total.
+  typedef base::Callback<void(int64, int64)> UploadProgressCallback;
+
+  virtual ~TraceUploader() {}
+
+  // Compresses and uploads the given file contents.
+  virtual void DoUpload(const std::string& file_contents,
+                        const UploadProgressCallback& progress_callback,
+                        const UploadDoneCallback& done_callback) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_TRACE_UPLOADER_H_