Replacing Indexed DB Chromium IPC with Mojo

content/child/indexed_db/indexed_db_dispatcher.h

Index: content/child/indexed_db/indexed_db_dispatcher.h
diff --git a/content/child/indexed_db/indexed_db_dispatcher.h b/content/child/indexed_db/indexed_db_dispatcher.h
deleted file mode 100644
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--- a/content/child/indexed_db/indexed_db_dispatcher.h
+++ /dev/null
@@ -1,309 +0,0 @@
-// Copyright 2013 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_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_
-#define CONTENT_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/gtest_prod_util.h"
-#include "base/id_map.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/strings/nullable_string16.h"
-#include "content/common/content_export.h"
-#include "content/common/indexed_db/indexed_db_constants.h"
-#include "content/public/child/worker_thread.h"
-#include "ipc/ipc_sync_message_filter.h"
-#include "third_party/WebKit/public/platform/WebBlobInfo.h"
-#include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBCallbacks.h"
-#include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBDatabaseCallbacks.h"
-#include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h"
-#include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBTypes.h"
-#include "url/origin.h"
-
-struct IndexedDBDatabaseMetadata;
-struct IndexedDBMsg_CallbacksSuccessCursorContinue_Params;
-struct IndexedDBMsg_CallbacksSuccessCursorPrefetch_Params;
-struct IndexedDBMsg_CallbacksSuccessIDBCursor_Params;
-struct IndexedDBMsg_CallbacksSuccessArray_Params;
-struct IndexedDBMsg_CallbacksSuccessValue_Params;
-struct IndexedDBMsg_CallbacksUpgradeNeeded_Params;
-struct IndexedDBMsg_Observation;
-struct IndexedDBMsg_ObserverChanges;
-
-namespace blink {
-class WebData;
-struct WebIDBObservation;
-}
-
-namespace content {
-class IndexedDBKey;
-class IndexedDBKeyPath;
-class IndexedDBKeyRange;
-class WebIDBCursorImpl;
-class WebIDBDatabaseImpl;
-class ThreadSafeSender;
-
-// Handle the indexed db related communication for this context thread - the
-// main thread and each worker thread have their own copies.
-class CONTENT_EXPORT IndexedDBDispatcher : public WorkerThread::Observer {
- public:
-  // Constructor made public to allow RenderThreadImpl to own a copy without
-  // failing a NOTREACHED in ThreadSpecificInstance in tests that instantiate
-  // two copies of RenderThreadImpl on the same thread.  Everyone else probably
-  // wants to use ThreadSpecificInstance().
-  explicit IndexedDBDispatcher(ThreadSafeSender* thread_safe_sender);
-  ~IndexedDBDispatcher() override;
-
-  // |thread_safe_sender| needs to be passed in because if the call leads to
-  // construction it will be needed.
-  static IndexedDBDispatcher* ThreadSpecificInstance(
-      ThreadSafeSender* thread_safe_sender);
-
-  // WorkerThread::Observer implementation.
-  void WillStopCurrentWorkerThread() override;
-
-  static blink::WebIDBMetadata ConvertMetadata(
-      const IndexedDBDatabaseMetadata& idb_metadata);
-  static std::vector<blink::WebIDBObservation> ConvertObservations(
-      const std::vector<IndexedDBMsg_Observation>& idb_observation);
-
-  void OnMessageReceived(const IPC::Message& msg);
-
-  // This method is virtual so it can be overridden in unit tests.
-  virtual bool Send(IPC::Message* msg);
-
-  int32_t AddIDBObserver(int32_t ipc_database_id,
-                         int64_t transaction_id,
-                         std::unique_ptr<blink::WebIDBObserver> observer);
-
-  //  The observer with ID's in |observer_ids_to_remove| observe the
-  //  |ipc_database_id|.
-  //  We remove our local references to these observer objects, and send an IPC
-  //  to clean up the observers from the backend.
-  void RemoveIDBObserversFromDatabase(
-      int32_t ipc_database_id,
-      const std::vector<int32_t>& observer_ids_to_remove);
-
-  // Removes observers from our local map observers_ . No IPC message generated.
-  void RemoveIDBObservers(const std::set<int32_t>& observer_ids_to_remove);
-
-  void RequestIDBFactoryGetDatabaseNames(blink::WebIDBCallbacks* callbacks,
-                                         const url::Origin& origin);
-
-  void RequestIDBFactoryOpen(const base::string16& name,
-                             int64_t version,
-                             int64_t transaction_id,
-                             blink::WebIDBCallbacks* callbacks,
-                             blink::WebIDBDatabaseCallbacks* database_callbacks,
-                             const url::Origin& origin);
-
-  void RequestIDBFactoryDeleteDatabase(const base::string16& name,
-                                       blink::WebIDBCallbacks* callbacks,
-                                       const url::Origin& origin);
-
-  // This method is virtual so it can be overridden in unit tests.
-  virtual void RequestIDBCursorAdvance(unsigned long count,
-                                       blink::WebIDBCallbacks* callbacks_ptr,
-                                       int32_t ipc_cursor_id,
-                                       int64_t transaction_id);
-
-  // This method is virtual so it can be overridden in unit tests.
-  virtual void RequestIDBCursorContinue(const IndexedDBKey& key,
-                                        const IndexedDBKey& primary_key,
-                                        blink::WebIDBCallbacks* callbacks_ptr,
-                                        int32_t ipc_cursor_id,
-                                        int64_t transaction_id);
-
-  // This method is virtual so it can be overridden in unit tests.
-  virtual void RequestIDBCursorPrefetch(int n,
-                                        blink::WebIDBCallbacks* callbacks_ptr,
-                                        int32_t ipc_cursor_id);
-
-  // This method is virtual so it can be overridden in unit tests.
-  virtual void RequestIDBCursorPrefetchReset(int used_prefetches,
-                                             int unused_prefetches,
-                                             int32_t ipc_cursor_id);
-
-  void RequestIDBDatabaseClose(int32_t ipc_database_id,
-                               int32_t ipc_database_callbacks_id);
-
-  void NotifyIDBDatabaseVersionChangeIgnored(int32_t ipc_database_id);
-
-  void RequestIDBDatabaseCreateTransaction(
-      int32_t ipc_database_id,
-      int64_t transaction_id,
-      blink::WebIDBDatabaseCallbacks* database_callbacks_ptr,
-      blink::WebVector<long long> object_store_ids,
-      blink::WebIDBTransactionMode mode);
-
-  void RequestIDBDatabaseGet(int32_t ipc_database_id,
-                             int64_t transaction_id,
-                             int64_t object_store_id,
-                             int64_t index_id,
-                             const IndexedDBKeyRange& key_range,
-                             bool key_only,
-                             blink::WebIDBCallbacks* callbacks);
-
-  void RequestIDBDatabaseGetAll(int32_t ipc_database_id,
-                                int64_t transaction_id,
-                                int64_t object_store_id,
-                                int64_t index_id,
-                                const IndexedDBKeyRange& key_range,
-                                bool key_only,
-                                int64_t max_count,
-                                blink::WebIDBCallbacks* callbacks);
-
-  void RequestIDBDatabasePut(
-      int32_t ipc_database_id,
-      int64_t transaction_id,
-      int64_t object_store_id,
-      const blink::WebData& value,
-      const blink::WebVector<blink::WebBlobInfo>& web_blob_info,
-      const IndexedDBKey& key,
-      blink::WebIDBPutMode put_mode,
-      blink::WebIDBCallbacks* callbacks,
-      const blink::WebVector<long long>& index_ids,
-      const blink::WebVector<blink::WebVector<blink::WebIDBKey>>& index_keys);
-
-  void RequestIDBDatabaseOpenCursor(int32_t ipc_database_id,
-                                    int64_t transaction_id,
-                                    int64_t object_store_id,
-                                    int64_t index_id,
-                                    const IndexedDBKeyRange& key_range,
-                                    blink::WebIDBCursorDirection direction,
-                                    bool key_only,
-                                    blink::WebIDBTaskType task_type,
-                                    blink::WebIDBCallbacks* callbacks);
-
-  void RequestIDBDatabaseCount(int32_t ipc_database_id,
-                               int64_t transaction_id,
-                               int64_t object_store_id,
-                               int64_t index_id,
-                               const IndexedDBKeyRange& key_range,
-                               blink::WebIDBCallbacks* callbacks);
-
-  void RequestIDBDatabaseDeleteRange(int32_t ipc_database_id,
-                                     int64_t transaction_id,
-                                     int64_t object_store_id,
-                                     const IndexedDBKeyRange& key_range,
-                                     blink::WebIDBCallbacks* callbacks);
-
-  void RequestIDBDatabaseClear(int32_t ipc_database_id,
-                               int64_t transaction_id,
-                               int64_t object_store_id,
-                               blink::WebIDBCallbacks* callbacks);
-
-  virtual void CursorDestroyed(int32_t ipc_cursor_id);
-  void DatabaseDestroyed(int32_t ipc_database_id);
-
- private:
-  FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, CursorReset);
-  FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, CursorTransactionId);
-  FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, ValueSizeTest);
-  FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, KeyAndValueSizeTest);
-
-  enum { kAllCursors = -1 };
-
-  static int32_t CurrentWorkerId() { return WorkerThread::GetCurrentId(); }
-
-  template <typename T>
-  void init_params(T* params, blink::WebIDBCallbacks* callbacks_ptr) {
-    std::unique_ptr<blink::WebIDBCallbacks> callbacks(callbacks_ptr);
-    params->ipc_thread_id = CurrentWorkerId();
-    params->ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
-  }
-
-  // IDBCallback message handlers.
-  void OnSuccessIDBDatabase(int32_t ipc_thread_id,
-                            int32_t ipc_callbacks_id,
-                            int32_t ipc_database_callbacks_id,
-                            int32_t ipc_object_id,
-                            const IndexedDBDatabaseMetadata& idb_metadata);
-  void OnSuccessIndexedDBKey(int32_t ipc_thread_id,
-                             int32_t ipc_callbacks_id,
-                             const IndexedDBKey& key);
-
-  void OnSuccessOpenCursor(
-      const IndexedDBMsg_CallbacksSuccessIDBCursor_Params& p);
-  void OnSuccessCursorContinue(
-      const IndexedDBMsg_CallbacksSuccessCursorContinue_Params& p);
-  void OnSuccessCursorPrefetch(
-      const IndexedDBMsg_CallbacksSuccessCursorPrefetch_Params& p);
-  void OnSuccessStringList(int32_t ipc_thread_id,
-                           int32_t ipc_callbacks_id,
-                           const std::vector<base::string16>& value);
-  void OnSuccessValue(const IndexedDBMsg_CallbacksSuccessValue_Params& p);
-  void OnSuccessArray(const IndexedDBMsg_CallbacksSuccessArray_Params& p);
-  void OnSuccessInteger(int32_t ipc_thread_id,
-                        int32_t ipc_callbacks_id,
-                        int64_t value);
-  void OnSuccessUndefined(int32_t ipc_thread_id, int32_t ipc_callbacks_id);
-  void OnError(int32_t ipc_thread_id,
-               int32_t ipc_callbacks_id,
-               int code,
-               const base::string16& message);
-  void OnIntBlocked(int32_t ipc_thread_id,
-                    int32_t ipc_callbacks_id,
-                    int64_t existing_version);
-  void OnUpgradeNeeded(const IndexedDBMsg_CallbacksUpgradeNeeded_Params& p);
-  void OnAbort(int32_t ipc_thread_id,
-               int32_t ipc_database_id,
-               int64_t transaction_id,
-               int code,
-               const base::string16& message);
-  void OnComplete(int32_t ipc_thread_id,
-                  int32_t ipc_database_id,
-                  int64_t transaction_id);
-  void OnDatabaseChanges(int32_t ipc_thread_id,
-                         int32_t ipc_database_id,
-                         const IndexedDBMsg_ObserverChanges&);
-
-  void OnForcedClose(int32_t ipc_thread_id, int32_t ipc_database_id);
-  void OnVersionChange(int32_t ipc_thread_id,
-                       int32_t ipc_database_id,
-                       int64_t old_version,
-                       int64_t new_version);
-
-  // Reset cursor prefetch caches for all cursors except exception_cursor_id.
-  void ResetCursorPrefetchCaches(int64_t transaction_id,
-                                 int32_t ipc_exception_cursor_id);
-
-  scoped_refptr<ThreadSafeSender> thread_safe_sender_;
-
-  // Maximum size (in bytes) of value/key pair allowed for put requests. Any
-  // requests larger than this size will be rejected.
-  // Used by unit tests to exercise behavior without allocating huge chunks
-  // of memory.
-  size_t max_put_value_size_ = kMaxIDBMessageSizeInBytes;
-
-  // Careful! WebIDBCallbacks wraps non-threadsafe data types. It must be
-  // destroyed and used on the same thread it was created on.
-  IDMap<blink::WebIDBCallbacks, IDMapOwnPointer> pending_callbacks_;
-  IDMap<blink::WebIDBDatabaseCallbacks, IDMapOwnPointer>
-      pending_database_callbacks_;
-  IDMap<blink::WebIDBObserver, IDMapOwnPointer> observers_;
-
-  // Maps the ipc_callback_id from an open cursor request to the request's
-  // transaction_id. Used to assign the transaction_id to the WebIDBCursorImpl
-  // when it is created.
-  std::map<int32_t, int64_t> cursor_transaction_ids_;
-
-  // Map from cursor id to WebIDBCursorImpl.
-  std::map<int32_t, WebIDBCursorImpl*> cursors_;
-
-  std::map<int32_t, WebIDBDatabaseImpl*> databases_;
-
-  DISALLOW_COPY_AND_ASSIGN(IndexedDBDispatcher);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_