[Sync] Move SharedModelTypeProcessor to model_impl/.

components/sync/model/model_type_debug_info.h

Index: components/sync/model/model_type_debug_info.h
diff --git a/components/sync/model/model_type_debug_info.h b/components/sync/model/model_type_debug_info.h
new file mode 100644
index 0000000000000000000000000000000000000000..437890e35f404ab348b33fa370395d028e13179f
--- /dev/null
+++ b/components/sync/model/model_type_debug_info.h
@@ -0,0 +1,53 @@
+// Copyright 2016 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_SYNC_MODEL_MODEL_TYPE_DEBUG_INFO_H_
+#define COMPONENTS_SYNC_MODEL_MODEL_TYPE_DEBUG_INFO_H_
+
+#include "base/callback.h"
+#include "base/memory/weak_ptr.h"
+#include "base/values.h"
+#include "components/sync/base/model_type.h"
+#include "components/sync/model/model_type_service.h"
+#include "components/sync/model_impl/shared_model_type_processor.h"
+
+namespace syncer {
+
+// This class holds static functions used for extracting debug information for a
+// model type. They should be run on the model thread. These functions are
+// static so they can be posted to from the UI thread, and they live inside a
+// class because it is a friend class to SharedModelTypeProcessor.
+class ModelTypeDebugInfo {
+ public:
+  // Returns a ListValue representing all nodes for the type to |callback|.
+  // Used for populating nodes in Sync Node Browser of chrome://sync-internals.
+  static void GetAllNodes(
+      const base::WeakPtr<ModelTypeService>& service,
+      const base::Callback<void(const ModelType,
+                                std::unique_ptr<base::ListValue>)>& callback);
+
+  // Returns StatusCounters for the type to |callback|.
+  // Used for updating data type counters in chrome://sync-internals.
+  static void GetStatusCounters(
+      const base::WeakPtr<ModelTypeService>& service,
+      const base::Callback<void(const ModelType, const StatusCounters&)>&
+          callback);
+
+ private:
+  ModelTypeDebugInfo();
+
+  // This is callback function for ModelTypeService::GetAllData. This function
+  // will merge real data from |batch| with metadata extracted from the
+  // |processor|, then pass it all to |callback|.
+  static void MergeDataWithMetadata(
+      SharedModelTypeProcessor* processor,
+      const base::Callback<void(const ModelType,
+                                std::unique_ptr<base::ListValue>)>& callback,
+      SyncError error,
+      std::unique_ptr<DataBatch> batch);
+};
+
+}  // namespace syncer
+
+#endif  // COMPONENTS_SYNC_MODEL_MODEL_TYPE_DEBUG_INFO_H_