Replacing Indexed DB Chromium IPC with Mojo

content/browser/indexed_db/indexed_db_dispatcher_host.h

Index: content/browser/indexed_db/indexed_db_dispatcher_host.h
diff --git a/content/browser/indexed_db/indexed_db_dispatcher_host.h b/content/browser/indexed_db/indexed_db_dispatcher_host.h
deleted file mode 100644
index 4ff5bd486d53bd7b5523c23805c634740456b588..0000000000000000000000000000000000000000
--- a/content/browser/indexed_db/indexed_db_dispatcher_host.h
+++ /dev/null
@@ -1,320 +0,0 @@
-// 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/id_map.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "content/browser/blob_storage/chrome_blob_storage_context.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 "storage/browser/quota/quota_manager.h"
-#include "storage/common/quota/quota_status_code.h"
-#include "url/gurl.h"
-
-struct IndexedDBDatabaseMetadata;
-struct IndexedDBHostMsg_DatabaseCount_Params;
-struct IndexedDBHostMsg_DatabaseCreateIndex_Params;
-struct IndexedDBHostMsg_DatabaseCreateObjectStore_Params;
-struct IndexedDBHostMsg_DatabaseCreateTransaction_Params;
-struct IndexedDBHostMsg_DatabaseDeleteRange_Params;
-struct IndexedDBHostMsg_DatabaseGet_Params;
-struct IndexedDBHostMsg_DatabaseGetAll_Params;
-struct IndexedDBHostMsg_DatabaseObserve_Params;
-struct IndexedDBHostMsg_DatabaseOpenCursor_Params;
-struct IndexedDBHostMsg_DatabasePut_Params;
-struct IndexedDBHostMsg_DatabaseSetIndexKeys_Params;
-struct IndexedDBHostMsg_FactoryDeleteDatabase_Params;
-struct IndexedDBHostMsg_FactoryGetDatabaseNames_Params;
-struct IndexedDBHostMsg_FactoryOpen_Params;
-struct IndexedDBMsg_Observation;
-struct IndexedDBMsg_ObserverChanges;
-
-namespace url {
-class Origin;
-}
-
-namespace content {
-class IndexedDBBlobInfo;
-class IndexedDBConnection;
-class IndexedDBContextImpl;
-class IndexedDBCursor;
-class IndexedDBKey;
-class IndexedDBKeyPath;
-class IndexedDBKeyRange;
-class IndexedDBObservation;
-class IndexedDBObserverChanges;
-struct IndexedDBDatabaseMetadata;
-
-// Handles all IndexedDB related messages from a particular renderer process.
-class IndexedDBDispatcherHost : public BrowserMessageFilter {
- 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);
-
-  static ::IndexedDBDatabaseMetadata ConvertMetadata(
-      const content::IndexedDBDatabaseMetadata& metadata);
-  static IndexedDBMsg_ObserverChanges ConvertObserverChanges(
-      std::unique_ptr<IndexedDBObserverChanges> changes);
-  static IndexedDBMsg_Observation ConvertObservation(
-      const IndexedDBObservation* observation);
-
-  // BrowserMessageFilter implementation.
-  void OnChannelClosing() override;
-  void OnDestruct() const override;
-  base::TaskRunner* OverrideTaskRunnerForMessage(
-      const IPC::Message& message) 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();
-  }
-
-  // IndexedDBCallbacks call these methods to add the results into the
-  // applicable map.  See below for more details.
-  int32_t Add(IndexedDBCursor* cursor);
-  int32_t Add(IndexedDBConnection* connection,
-              int32_t ipc_thread_id,
-              const url::Origin& origin);
-
-  void RegisterTransactionId(int64_t host_transaction_id,
-                             const url::Origin& origin);
-
-  IndexedDBCursor* GetCursorFromId(int32_t ipc_cursor_id);
-
-  // 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);
-
- 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> TransactionIDToDatabaseIDMap;
-  typedef std::map<int64_t, uint64_t> TransactionIDToSizeMap;
-  typedef std::map<int64_t, url::Origin> TransactionIDToOriginMap;
-  typedef std::map<int32_t, url::Origin> WebIDBObjectIDToOriginMap;
-
-  // IDMap for RefCounted types
-  template <typename RefCountedType>
-  class RefIDMap {
-   public:
-    typedef int32_t KeyType;
-
-    RefIDMap() {}
-    ~RefIDMap() {}
-
-    KeyType Add(RefCountedType* data) {
-      return map_.Add(new scoped_refptr<RefCountedType>(data));
-    }
-
-    RefCountedType* Lookup(KeyType id) {
-      scoped_refptr<RefCountedType>* ptr = map_.Lookup(id);
-      if (ptr == NULL)
-        return NULL;
-      return ptr->get();
-    }
-
-    void Remove(KeyType id) { map_.Remove(id); }
-
-    void set_check_on_null_data(bool value) {
-      map_.set_check_on_null_data(value);
-    }
-
-   private:
-    IDMap<scoped_refptr<RefCountedType>, IDMapOwnPointer> map_;
-
-    DISALLOW_COPY_AND_ASSIGN(RefIDMap);
-  };
-
-  class DatabaseDispatcherHost {
-   public:
-    explicit DatabaseDispatcherHost(IndexedDBDispatcherHost* parent);
-    ~DatabaseDispatcherHost();
-
-    void CloseAll();
-    bool OnMessageReceived(const IPC::Message& message);
-
-    void OnCreateObjectStore(
-        const IndexedDBHostMsg_DatabaseCreateObjectStore_Params& params);
-    void OnDeleteObjectStore(int32_t ipc_database_id,
-                             int64_t transaction_id,
-                             int64_t object_store_id);
-    void OnCreateTransaction(
-        const IndexedDBHostMsg_DatabaseCreateTransaction_Params&);
-    void OnClose(int32_t ipc_database_id);
-    void OnVersionChangeIgnored(int32_t ipc_database_id);
-    void OnDestroyed(int32_t ipc_database_id);
-
-    void OnObserve(const IndexedDBHostMsg_DatabaseObserve_Params&);
-    void OnUnobserve(int32_t ipc_database_id,
-                     const std::vector<int32_t>& observer_ids_to_remove);
-
-    void OnGet(const IndexedDBHostMsg_DatabaseGet_Params& params);
-    void OnGetAll(const IndexedDBHostMsg_DatabaseGetAll_Params& params);
-    // OnPutWrapper starts on the IO thread so that it can grab BlobDataHandles
-    // before posting to the IDB TaskRunner for the rest of the job.
-    void OnPutWrapper(const IndexedDBHostMsg_DatabasePut_Params& params);
-    void OnPut(const IndexedDBHostMsg_DatabasePut_Params& params,
-               std::vector<storage::BlobDataHandle*> handles);
-    void OnSetIndexKeys(
-        const IndexedDBHostMsg_DatabaseSetIndexKeys_Params& params);
-    void OnSetIndexesReady(int32_t ipc_database_id,
-                           int64_t transaction_id,
-                           int64_t object_store_id,
-                           const std::vector<int64_t>& ids);
-    void OnOpenCursor(const IndexedDBHostMsg_DatabaseOpenCursor_Params& params);
-    void OnCount(const IndexedDBHostMsg_DatabaseCount_Params& params);
-    void OnDeleteRange(
-        const IndexedDBHostMsg_DatabaseDeleteRange_Params& params);
-    void OnClear(int32_t ipc_thread_id,
-                 int32_t ipc_callbacks_id,
-                 int32_t ipc_database_id,
-                 int64_t transaction_id,
-                 int64_t object_store_id);
-    void OnCreateIndex(
-        const IndexedDBHostMsg_DatabaseCreateIndex_Params& params);
-    void OnDeleteIndex(int32_t ipc_database_id,
-                       int64_t transaction_id,
-                       int64_t object_store_id,
-                       int64_t index_id);
-
-    void OnAbort(int32_t ipc_database_id, int64_t transaction_id);
-    void OnCommit(int32_t ipc_database_id, int64_t transaction_id);
-    void OnGotUsageAndQuotaForCommit(int32_t ipc_database_id,
-                                     int64_t transaction_id,
-                                     storage::QuotaStatusCode status,
-                                     int64_t usage,
-                                     int64_t quota);
-
-    IndexedDBDispatcherHost* parent_;
-    IDMap<IndexedDBConnection, IDMapOwnPointer> map_;
-    WebIDBObjectIDToOriginMap database_origin_map_;
-    TransactionIDToSizeMap transaction_size_map_;
-    TransactionIDToOriginMap transaction_origin_map_;
-    TransactionIDToDatabaseIDMap transaction_database_map_;
-
-    // Weak pointers are used when an asynchronous quota request is made, in
-    // case the dispatcher is torn down before the response returns.
-    base::WeakPtrFactory<DatabaseDispatcherHost> weak_factory_;
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(DatabaseDispatcherHost);
-  };
-
-  class CursorDispatcherHost {
-   public:
-    explicit CursorDispatcherHost(IndexedDBDispatcherHost* parent);
-    ~CursorDispatcherHost();
-
-    bool OnMessageReceived(const IPC::Message& message);
-
-    void OnAdvance(int32_t ipc_object_store_id,
-                   int32_t ipc_thread_id,
-                   int32_t ipc_callbacks_id,
-                   uint32_t count);
-    void OnContinue(int32_t ipc_object_store_id,
-                    int32_t ipc_thread_id,
-                    int32_t ipc_callbacks_id,
-                    const IndexedDBKey& key,
-                    const IndexedDBKey& primary_key);
-    void OnPrefetch(int32_t ipc_cursor_id,
-                    int32_t ipc_thread_id,
-                    int32_t ipc_callbacks_id,
-                    int n);
-    void OnPrefetchReset(int32_t ipc_cursor_id,
-                         int used_prefetches,
-                         int unused_prefetches);
-    void OnDestroyed(int32_t ipc_cursor_id);
-
-    IndexedDBDispatcherHost* parent_;
-    RefIDMap<IndexedDBCursor> map_;
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(CursorDispatcherHost);
-  };
-
-  ~IndexedDBDispatcherHost() override;
-
-  // Helper templates.
-  template <class ReturnType>
-  ReturnType* GetOrTerminateProcess(IDMap<ReturnType, IDMapOwnPointer>* map,
-                                    int32_t ipc_return_object_id);
-  template <class ReturnType>
-  ReturnType* GetOrTerminateProcess(RefIDMap<ReturnType>* map,
-                                    int32_t ipc_return_object_id);
-
-  template <typename MapType>
-  void DestroyObject(MapType* map, int32_t ipc_object_id);
-
-  // Message processing. Most of the work is delegated to the dispatcher hosts
-  // below.
-  void OnIDBFactoryGetDatabaseNames(
-      const IndexedDBHostMsg_FactoryGetDatabaseNames_Params& p);
-  void OnIDBFactoryOpen(const IndexedDBHostMsg_FactoryOpen_Params& p);
-
-  void OnIDBFactoryDeleteDatabase(
-      const IndexedDBHostMsg_FactoryDeleteDatabase_Params& p);
-
-  void OnAckReceivedBlobs(const std::vector<std::string>& uuids);
-  void OnPutHelper(const IndexedDBHostMsg_DatabasePut_Params& params,
-                   std::vector<storage::BlobDataHandle*> handles);
-
-  void ResetDispatcherHosts();
-  void DropBlobData(const std::string& uuid);
-
-  scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
-  scoped_refptr<IndexedDBContextImpl> indexed_db_context_;
-  scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
-
-  // 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.
-  std::unique_ptr<DatabaseDispatcherHost> database_dispatcher_host_;
-  std::unique_ptr<CursorDispatcherHost> cursor_dispatcher_host_;
-
-  // 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_