[IndexedDB] Add Observer Tests

third_party/WebKit/Source/modules/indexeddb/IDBObserver.cpp

 // 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.
 
 #include "modules/indexeddb/IDBObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/modules/v8/IDBObserverCallback.h"
 #include "bindings/modules/v8/ToV8ForModules.h"
 #include "bindings/modules/v8/V8BindingForModules.h"
@@ skipping 14 matching lines @@
 }
 
 IDBObserver::IDBObserver(ScriptState* scriptState,
                          IDBObserverCallback* callback,
                          const IDBObserverInit& options)
     : m_scriptState(scriptState),
       m_callback(callback),
       m_transaction(options.transaction()),
       m_values(options.values()),
       m_noRecords(options.noRecords()) {
-  // TODO(palakj): Throw an exception if unknown operation type.
   DCHECK_EQ(m_operationTypes.size(),
             static_cast<size_t>(WebIDBOperationTypeCount));
   m_operationTypes.reset();
   m_operationTypes[WebIDBAdd] =
       options.operationTypes().contains(IndexedDBNames::add);
   m_operationTypes[WebIDBPut] =
       options.operationTypes().contains(IndexedDBNames::put);
   m_operationTypes[WebIDBDelete] =
       options.operationTypes().contains(IndexedDBNames::kDelete);
   m_operationTypes[WebIDBClear] =
@@ skipping 60 matching lines @@
       m_scriptState.get(), this,
       IDBObserverChanges::create(it->value, observations, observationIndex));
 }
 
 DEFINE_TRACE(IDBObserver) {
   visitor->trace(m_callback);
   visitor->trace(m_observerIds);
 }
 
 }  // namespace blink