Make MetricsService upload logs through an interface.

components/metrics/metrics_service_client.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 COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
 #define COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
 #include "components/metrics/proto/system_profile.pb.h"
 
 namespace metrics {
 
+class MetricsLogUploader;
+
 // An abstraction of operations that depend on the embedder's (e.g. Chrome)
 // environment.
 class MetricsServiceClient {
  public:
   virtual ~MetricsServiceClient() {}
 
   // Register the client id with other services (e.g. crash reporting), called
   // when metrics recording gets enabled.
   virtual void SetClientID(const std::string& client_id) = 0;
 
@@ skipping 17 matching lines @@
   virtual void OnLogUploadComplete() = 0;
 
   // Starts gathering metrics, calling |done_callback| when initial metrics
   // gathering is complete.
   virtual void StartGatheringMetrics(const base::Closure& done_callback) = 0;
 
   // Called prior to a metrics log being closed, allowing the client to collect
   // extra histograms that will go in that log. Asynchronous API - the client
   // implementation should call |done_callback| when complete.
   virtual void CollectFinalMetrics(const base::Closure& done_callback) = 0;
+
+  // Creates a MetricsLogUploader with the specified parameters (see comments on
+  // MetricsLogUploader for details).
+  virtual scoped_ptr<MetricsLogUploader> CreateUploader(
+      const std::string& server_url,
+      const std::string& mime_type,
+      const base::Callback<void(int)>& on_upload_complete) = 0;
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_