[WebView] Merge AwMetricsServiceClient and move few files to new place

android_webview/browser/aw_metrics_service_client.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
+// Copyright 2017 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 ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_H_
 #define ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_H_
 
+#include <jni.h>
+#include <memory>
+#include <string>
+
+#include "base/lazy_instance.h"
+#include "base/macros.h"
 #include "components/metrics/enabled_state_provider.h"
+#include "components/metrics/metrics_log_uploader.h"
 #include "components/metrics/metrics_service_client.h"
 
 class PrefService;
 
 namespace base {
 class FilePath;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
+namespace metrics {
+class MetricsStateManager;
+}
+
 namespace android_webview {
 
+// This singleton manages metrics for an app using any number of WebViews. It
+// must always be used on the same thread. (Currently the UI thread is enforced,
+// but it could be any thread.) This is to prevent enable/disable race
+// conditions, and because MetricsService is single-threaded. Initialization is
+// asynchronous; even after Initialize has returned, some methods may not be
+// ready to use (see below).
 class AwMetricsServiceClient : public metrics::MetricsServiceClient,
                                public metrics::EnabledStateProvider {
+  friend struct base::LazyInstanceTraitsBase<AwMetricsServiceClient>;
+
  public:
   static AwMetricsServiceClient* GetInstance();
-  virtual void Initialize(PrefService* pref_service,
-                          net::URLRequestContextGetter* request_context,
-                          const base::FilePath guid_file_path) = 0;
+  void Initialize(PrefService* pref_service,
+                  net::URLRequestContextGetter* request_context,
+                  const base::FilePath guid_file_path);
 
- protected:
+  // metrics::EnabledStateProvider implementation
+  bool IsConsentGiven() override;
+
+  // The below functions must not be called until initialization has
+  // asynchronously finished.
+
+  void SetMetricsEnabled(bool enabled);
+
+  // metrics::MetricsServiceClient implementation
+  metrics::MetricsService* GetMetricsService() override;
+  void SetMetricsClientId(const std::string& client_id) override;
+  int32_t GetProduct() override;
+  std::string GetApplicationLocale() override;
+  bool GetBrand(std::string* brand_code) override;
+  metrics::SystemProfileProto::Channel GetChannel() override;
+  std::string GetVersionString() override;
+  void InitializeSystemProfileMetrics(
+      const base::Closure& done_callback) override;
+  void CollectFinalMetricsForLog(const base::Closure& done_callback) override;
+  std::unique_ptr<metrics::MetricsLogUploader> CreateUploader(
+      base::StringPiece server_url,
+      base::StringPiece mime_type,
+      metrics::MetricsLogUploader::MetricServiceType service_type,
+      const metrics::MetricsLogUploader::UploadCallback& on_upload_complete)
+      override;
+  base::TimeDelta GetStandardUploadInterval() override;
+
+ private:
   AwMetricsServiceClient();
   ~AwMetricsServiceClient() override;
 
- private:
+  void InitializeWithGUID(std::string* guid);
+
+  bool is_enabled_;
+  PrefService* pref_service_;
+  net::URLRequestContextGetter* request_context_;
+  std::unique_ptr<metrics::MetricsStateManager> metrics_state_manager_;
+  std::unique_ptr<metrics::MetricsService> metrics_service_;
+
   DISALLOW_COPY_AND_ASSIGN(AwMetricsServiceClient);
 };
 
+bool RegisterAwMetricsServiceClient(JNIEnv* env);
+
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_H_