Revert ExtendableMessageEvent same heap verification.

Revert r440390's debug instrumentation of ExtendableMessageEvent.

R=
BUG=655926

Review-Url: https://codereview.chromium.org/2623273004
Cr-Commit-Position: refs/heads/master@{#443299}

third_party/WebKit/Source/modules/serviceworkers/ExtendableMessageEvent.cpp

@@ -117,17 +117,8 @@ ExtendableMessageEvent::ExtendableMessageEvent(
     else if (initializer.source().isMessagePort())
       m_sourceAsMessagePort = initializer.source().getAsMessagePort();
   }
-  if (initializer.hasPorts()) {
-    // TODO(sof): remove the extra same-heap checks once crbug.com/655926
-    // has been resolved.
-    const MessagePortArray& ports = initializer.ports();
-    m_ports = new MessagePortArray;
-    m_ports->reserveInitialCapacity(ports.size());
-    for (const auto& port : ports) {
-      CHECK(ThreadState::current()->isOnThreadHeap(port.get()));
-      m_ports->push_back(port);
-    }
-  }
+  if (initializer.hasPorts())
+    m_ports = new MessagePortArray(initializer.ports());
 }
 
 ExtendableMessageEvent::ExtendableMessageEvent(
@@ -144,14 +135,6 @@ ExtendableMessageEvent::ExtendableMessageEvent(
       m_ports(ports) {
   if (m_serializedData)
     m_serializedData->registerMemoryAllocatedWithCurrentScriptContext();
-
-  // TODO(sof): remove the same-heap verification once crbug.com/655926 has
-  // been resolved.
-  if (m_ports) {
-    for (const auto& port : *m_ports) {
-      CHECK(ThreadState::current()->isOnThreadHeap(port.get()));
-    }
-  }
 }
 
 }  // namespace blink

third_party/WebKit/Source/modules/serviceworkers/ExtendableMessageEvent.h

@@ -71,8 +71,7 @@ class MODULES_EXPORT ExtendableMessageEvent final : public ExtendableEvent {
   Member<ServiceWorkerClient> m_sourceAsClient;
   Member<ServiceWorker> m_sourceAsServiceWorker;
   Member<MessagePort> m_sourceAsMessagePort;
-  // TODO(sof): remove once crbug.com/655926 has been addressed.
-  SameThreadCheckedMember<MessagePortArray> m_ports;
+  Member<MessagePortArray> m_ports;
 };
 
 }  // namespace blink