Port messages sent by WebIDBFactoryImpl to Mojo.

content/child/indexed_db/indexed_db_callbacks_impl.h

+// 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 CONTENT_CHILD_INDEXED_DB_INDEXED_DB_CALLBACKS_IMPL_H_
+#define CONTENT_CHILD_INDEXED_DB_INDEXED_DB_CALLBACKS_IMPL_H_
+
+#include "content/common/indexed_db/indexed_db.mojom.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
+
+namespace blink {
+class WebIDBCallbacks;
+}
+
+namespace content {
+
+class ThreadSafeSender;
+
+// Implements the child-process end of the pipe used to deliver callbacks. It
+// is owned by the IO thread. |callback_runner_| is used to post tasks back to
+// the thread which owns the blink::WebIDBCallbacks.
+class IndexedDBCallbacksImpl : public indexed_db::mojom::Callbacks {
+ public:
+  class InternalState {
+   public:
+    InternalState(blink::WebIDBCallbacks* callbacks,

[dcheng, 2016/10/19 23:44:02]

Nit: make this a std::unique_ptr if it's not too viral

[Reilly Grant (use Gerrit), 2016/10/20 01:46:18]

Done.

+                  scoped_refptr<ThreadSafeSender> thread_safe_sender);
+    ~InternalState();
+
+    void Error(int32_t code, const base::string16& message);
+    void SuccessStringList(const std::vector<base::string16>& value);
+    void Blocked(int64_t existing_version);
+    void UpgradeNeeded(int32_t database_id,
+                       int64_t old_version,
+                       blink::WebIDBDataLoss data_loss,
+                       const std::string& data_loss_message,
+                       const content::IndexedDBDatabaseMetadata& metadata);
+    void SuccessDatabase(int32_t database_id,
+                         const content::IndexedDBDatabaseMetadata& metadata);
+    void SuccessInteger(int64_t value);
+
+   private:
+    std::unique_ptr<blink::WebIDBCallbacks> callbacks_;
+    scoped_refptr<ThreadSafeSender> thread_safe_sender_;
+
+    DISALLOW_COPY_AND_ASSIGN(InternalState);
+  };
+
+  IndexedDBCallbacksImpl(blink::WebIDBCallbacks* callbacks,
+                         scoped_refptr<ThreadSafeSender> thread_safe_sender);
+  ~IndexedDBCallbacksImpl() override;
+
+  // indexed_db::mojom::Callbacks implementation:
+  void Error(int32_t code, const base::string16& message) override;
+  void SuccessStringList(const std::vector<base::string16>& value) override;
+  void Blocked(int64_t existing_version) override;
+  void UpgradeNeeded(
+      int32_t database_id,
+      int64_t old_version,
+      blink::WebIDBDataLoss data_loss,
+      const std::string& data_loss_message,
+      const content::IndexedDBDatabaseMetadata& metadata) override;
+  void SuccessDatabase(
+      int32_t database_id,
+      const content::IndexedDBDatabaseMetadata& metadata) override;
+  void SuccessInteger(int64_t value) override;
+
+ private:
+  // |internal_state_| is owned by the thread on which |callback_runner_|
+  // executes tasks and must be destroyed there.
+  InternalState* internal_state_;
+  scoped_refptr<base::SingleThreadTaskRunner> callback_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBCallbacksImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_INDEXED_DB_INDEXED_DB_CALLBACKS_IMPL_H_