Enumerate the return value of dispatchEvent so it is clear.

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

Index: third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
index 302ad1b368d523e52ce3508d837b4b099d3b243f..c9d648a0ca2cdd90daf6bbf04000952ae733d292 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
@@ -344,12 +344,12 @@ ExecutionContext* IDBTransaction::executionContext() const
     return ActiveDOMObject::executionContext();
 }
 
-bool IDBTransaction::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
+DispatchEventResult IDBTransaction::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
 {
     IDB_TRACE("IDBTransaction::dispatchEvent");
     if (m_contextStopped || !executionContext()) {
         m_state = Finished;
-        return false;
+        return DispatchEventResult::CanceledBeforeDispatch;
     }
     ASSERT(m_state != Finished);
     ASSERT(m_hasPendingActivity);
@@ -371,7 +371,7 @@ bool IDBTransaction::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
 
     // FIXME: When we allow custom event dispatching, this will probably need to change.
     ASSERT(event->type() == EventTypeNames::complete || event->type() == EventTypeNames::abort);
-    bool returnValue = IDBEventDispatcher::dispatch(event.get(), targets);
+    DispatchEventResult dispatchResult = IDBEventDispatcher::dispatch(event.get(), targets);
     // FIXME: Try to construct a test where |this| outlives openDBRequest and we
     // get a crash.
     if (m_openDBRequest) {
@@ -379,7 +379,7 @@ bool IDBTransaction::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
         m_openDBRequest->transactionDidFinishAndDispatch();
     }
     m_hasPendingActivity = false;
-    return returnValue;
+    return dispatchResult;
 }
 
 void IDBTransaction::stop()