[IndexedDB] Propogating changes to observers : Renderer

third_party/WebKit/Source/modules/indexeddb/IDBObserver.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 IDBObserver_h
 #define IDBObserver_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
-#include <set>
+#include "public/platform/WebVector.h"
+#include "public/platform/modules/indexeddb/WebIDBTypes.h"
+#include <bitset>
 
 namespace blink {
 
 class ExceptionState;
 class IDBDatabase;
 class IDBObserverCallback;
 class IDBObserverInit;
 class IDBTransaction;
+struct WebIDBObservation;
 
 class MODULES_EXPORT IDBObserver final : public GarbageCollectedFinalized<IDBObserver>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 
 public:
     static IDBObserver* create(IDBObserverCallback&, const IDBObserverInit&);
 
     ~IDBObserver();
-    // API methods
+
+    void removeObserver(int32_t id);
+    void onChange(int32_t id, const WebVector<WebIDBObservation>&, const WebVector<int32_t>& observationIndex);
+
+    bool transaction() const { return m_transaction; }
+    bool noRecords() const { return m_noRecords; }
+    bool values() const { return m_values; }
+    std::bitset<WebIDBOperationTypeCount> operationTypes() const

[jsbell, 2016/07/18 23:38:57]

Return a reference, rather than a copy.

[palakj1, 2016/07/19 03:53:11]

Done

+    {
+        return m_operationTypes;

[jsbell, 2016/07/18 23:38:57]

You can put this all on one line.

[palakj1, 2016/07/19 03:53:11]

Done

+    }
+
+    // Implement the IDBObserver IDL.
     void observe(IDBDatabase*, IDBTransaction*, ExceptionState&);
     void unobserve(IDBDatabase*, ExceptionState&);
-    void removeObserver(int32_t id);
 
     DECLARE_TRACE();
 
 private:
     IDBObserver(IDBObserverCallback&, const IDBObserverInit&);
 
     Member<IDBObserverCallback> m_callback;
     bool m_transaction;
     bool m_values;
     bool m_noRecords;
-    std::set<int32_t> m_observerIds;
+    // Operation types and corresponding bits are add(0), put(1), delete(2), clear(3).

[jsbell, 2016/07/18 23:38:57]

Can you reference WebIDBOperationType in the comment, rather than duplicating
the names/values?

[palakj1, 2016/07/19 03:53:11]

Done

+    std::bitset<WebIDBOperationTypeCount> m_operationTypes;
+    HeapHashMap<int32_t, WeakMember<IDBDatabase>> m_observerIds;
 };
 
 } // namespace blink
 
 #endif // IDBObserver_h