[IndexedDB] Refactoring to remove ref ptrs and host transaction ids.

content/browser/indexed_db/indexed_db_dispatcher_host.h

 // Copyright (c) 2012 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_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/common/indexed_db/indexed_db.mojom.h"
 #include "content/public/browser/browser_associated_interface.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "storage/browser/blob/blob_data_handle.h"
-#include "url/gurl.h"
 
 namespace url {
 class Origin;
 }
 
 namespace content {
 class IndexedDBBlobInfo;
 class IndexedDBCallbacks;
 class IndexedDBContextImpl;
 class IndexedDBDatabaseCallbacks;
 
 // Handles all IndexedDB related messages from a particular renderer process.
 class IndexedDBDispatcherHost
     : public BrowserMessageFilter,
       public BrowserAssociatedInterface<::indexed_db::mojom::Factory>,
       public ::indexed_db::mojom::Factory {
  public:
   // Only call the constructor from the UI thread.
   IndexedDBDispatcherHost(int ipc_process_id,
                           net::URLRequestContextGetter* request_context_getter,
                           IndexedDBContextImpl* indexed_db_context,
                           ChromeBlobStorageContext* blob_storage_context);
 
   // BrowserMessageFilter implementation.
   void OnChannelClosing() override;
   void OnDestruct() const override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
-  void FinishTransaction(int64_t host_transaction_id, bool committed);
-
   // A shortcut for accessing our context.
   IndexedDBContextImpl* context() const { return indexed_db_context_.get(); }
   storage::BlobStorageContext* blob_storage_context() const {
     return blob_storage_context_->context();
   }
   int ipc_process_id() const { return ipc_process_id_; }
 
-  bool RegisterTransactionId(int64_t host_transaction_id,
-                             const url::Origin& origin);
-  bool GetTransactionSize(int64_t host_transaction_id,
-                          int64_t* transaction_size);
-  void AddToTransaction(int64_t host_transaction_id, int64_t value_length);
-
-  // These are called to map a 32-bit front-end (renderer-specific) transaction
-  // id to and from a back-end ("host") transaction id that encodes the process
-  // id in the high 32 bits. The mapping is host-specific and ids are validated.
-  int64_t HostTransactionId(int64_t transaction_id);
-  int64_t RendererTransactionId(int64_t host_transaction_id);
-
-  // These are called to decode a host transaction ID, for diagnostic purposes.
-  static uint32_t TransactionIdToRendererTransactionId(
-      int64_t host_transaction_id);
-  static uint32_t TransactionIdToProcessId(int64_t host_transaction_id);
-
   std::string HoldBlobData(const IndexedDBBlobInfo& blob_info);
   void DropBlobData(const std::string& uuid);
 
   // True if the channel is closing/closed and outstanding requests
   // can be abandoned. Only access on IndexedDB thread.
   bool IsOpen() const;
 
  private:
   // Friends to enable OnDestruct() delegation.
   friend class BrowserThread;
   friend class base::DeleteHelper<IndexedDBDispatcherHost>;
 
-  // Used in nested classes.
-  typedef std::map<int64_t, int64_t> TransactionIDToSizeMap;
-  typedef std::map<int64_t, url::Origin> TransactionIDToOriginMap;
-
   ~IndexedDBDispatcherHost() override;
 
   // indexed_db::mojom::Factory implementation:
   void GetDatabaseNames(
       ::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks_info,
       const url::Origin& origin) override;
   void Open(::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks_info,
             ::indexed_db::mojom::DatabaseCallbacksAssociatedPtrInfo
                 database_callbacks_info,
             const url::Origin& origin,
@@ skipping 26 matching lines @@
 
   // Maps blob uuid to a pair (handle, ref count). Entry is added and/or count
   // is incremented in HoldBlobData(), and count is decremented and/or entry
   // removed in DropBlobData().
   std::map<std::string,
            std::pair<std::unique_ptr<storage::BlobDataHandle>, int>>
       blob_data_handle_map_;
 
   // Only access on IndexedDB thread.
   bool is_open_ = true;
-  TransactionIDToSizeMap transaction_size_map_;
-  TransactionIDToOriginMap transaction_origin_map_;
 
   // Used to set file permissions for blob storage.
   int ipc_process_id_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_