Migrate the IndexedDB backend from Blink to Chromium

To get the IDB backend off the (deprecated) WebKit thread, remove
intermediate proxying, and let us take advantage of base utilities,
we're moving the code from Blink to Chromium.

This patch is basically a glorified copy/paste of the Blink IDB
backend code, with Chromium coding style applied, WTF dependencies
replaced with STL and base/, redundant classes removed, etc. It
introduces some new temporary proxy classes
(content/browser/webidb*_impl.*) to allow us build both the old and
new backends.

The new backend is currently disabled by default. It can be enabled
using a new (and temporary) command line switch: --new-indexeddb Once
we've done some further cleanup and are confident that the new backend
is stable, and the bots have moved from DumpRenderTree to
content_shell, we'll switch to the new backend by default. Once that
has survived through a dev channel release, we'll delete the Blink
code and eliminate unnecessary proxy classes.

BUG=234278
R=alecflett@chromium.org, dgrogan@chromium.org, piman@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=202215

Review URL: https://codereview.chromium.org/15564008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202604 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 131 insertions, 0 deletions

diff --git a/content/browser/indexed_db/indexed_db_database.h b/content/browser/indexed_db/indexed_db_database.h
new file mode 100644
index 0000000..880e880
--- /dev/null
+++ b/content/browser/indexed_db/indexed_db_database.h
@@ -0,0 +1,131 @@
+// Copyright (c) 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_BROWSER_INDEXED_DB_INDEXED_DB_DATABASE_H_
+#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DATABASE_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string16.h"
+#include "content/browser/indexed_db/indexed_db.h"
+#include "content/browser/indexed_db/indexed_db_database_error.h"
+#include "content/common/indexed_db/indexed_db_key.h"
+#include "content/common/indexed_db/indexed_db_key_path.h"
+#include "content/common/indexed_db/indexed_db_key_range.h"
+
+namespace content {
+
+class IndexedDBCallbacksWrapper;
+class IndexedDBDatabaseCallbacksWrapper;
+struct IndexedDBDatabaseMetadata;
+
+// This is implemented by IndexedDBDatabaseImpl and optionally others (in order
+// to proxy calls across process barriers). All calls to these classes should be
+// non-blocking and trigger work on a background thread if necessary.
+class IndexedDBDatabase : public base::RefCounted<IndexedDBDatabase> {
+ public:
+  virtual void CreateObjectStore(int64 transaction_id,
+                                 int64 object_store_id,
+                                 const string16& name,
+                                 const IndexedDBKeyPath& key_path,
+                                 bool auto_increment) = 0;
+  virtual void DeleteObjectStore(int64 transaction_id,
+                                 int64 object_store_id) = 0;
+  virtual void CreateTransaction(
+      int64 transaction_id,
+      scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks,
+      const std::vector<int64>& object_store_ids,
+      uint16 mode) = 0;
+  virtual void Close(
+      scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks) = 0;
+
+  // Transaction-specific operations.
+  virtual void Commit(int64 transaction_id) = 0;
+  virtual void Abort(int64 transaction_id) = 0;
+  virtual void Abort(int64 transaction_id,
+                     scoped_refptr<IndexedDBDatabaseError> error) = 0;
+
+  virtual void CreateIndex(int64 transaction_id,
+                           int64 object_store_id,
+                           int64 index_id,
+                           const string16& name,
+                           const IndexedDBKeyPath& key_path,
+                           bool unique,
+                           bool multi_entry) = 0;
+  virtual void DeleteIndex(int64 transaction_id,
+                           int64 object_store_id,
+                           int64 index_id) = 0;
+
+  enum TaskType {
+    NORMAL_TASK = 0,
+    PREEMPTIVE_TASK
+  };
+
+  enum PutMode {
+    ADD_OR_UPDATE,
+    ADD_ONLY,
+    CURSOR_UPDATE
+  };
+
+  static const int64 kMinimumIndexId = 30;
+
+  typedef std::vector<IndexedDBKey> IndexKeys;
+
+  virtual void Get(int64 transaction_id,
+                   int64 object_store_id,
+                   int64 index_id,
+                   scoped_ptr<IndexedDBKeyRange> key_range,
+                   bool key_only,
+                   scoped_refptr<IndexedDBCallbacksWrapper> callbacks) = 0;
+  // This will swap() with value.
+  virtual void Put(int64 transaction_id,
+                   int64 object_store_id,
+                   std::vector<char>* value,
+                   scoped_ptr<IndexedDBKey> key,
+                   PutMode mode,
+                   scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
+                   const std::vector<int64>& index_ids,
+                   const std::vector<IndexKeys>& index_keys) = 0;
+  virtual void SetIndexKeys(int64 transaction_id,
+                            int64 object_store_id,
+                            scoped_ptr<IndexedDBKey> primary_key,
+                            const std::vector<int64>& index_ids,
+                            const std::vector<IndexKeys>& index_keys) = 0;
+  virtual void SetIndexesReady(int64 transaction_id,
+                               int64 object_store_id,
+                               const std::vector<int64>& index_ids) = 0;
+  virtual void OpenCursor(
+      int64 transaction_id,
+      int64 object_store_id,
+      int64 index_id,
+      scoped_ptr<IndexedDBKeyRange> key_Range,
+      indexed_db::CursorDirection direction,
+      bool key_only,
+      TaskType task_type,
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks) = 0;
+  virtual void Count(int64 transaction_id,
+                     int64 object_store_id,
+                     int64 index_id,
+                     scoped_ptr<IndexedDBKeyRange> key_range,
+                     scoped_refptr<IndexedDBCallbacksWrapper> callbacks) = 0;
+  virtual void DeleteRange(
+      int64 transaction_id,
+      int64 object_store_id,
+      scoped_ptr<IndexedDBKeyRange> key_range,
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks) = 0;
+  virtual void Clear(int64 transaction_id,
+                     int64 object_store_id,
+                     scoped_refptr<IndexedDBCallbacksWrapper> callbacks) = 0;
+
+ protected:
+  virtual ~IndexedDBDatabase() {}
+  friend class base::RefCounted<IndexedDBDatabase>;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DATABASE_H_