Revert of Reduce ActiveDOMObjects from core/

third_party/WebKit/Source/core/page/EventSource.cpp

Index: third_party/WebKit/Source/core/page/EventSource.cpp
diff --git a/third_party/WebKit/Source/core/page/EventSource.cpp b/third_party/WebKit/Source/core/page/EventSource.cpp
index 9e2d27d98d0e8cb752b2c848dcd81447f38b88e5..0fb02c69acb4c03d16383bfdf3f2d61341c951f1 100644
--- a/third_party/WebKit/Source/core/page/EventSource.cpp
+++ b/third_party/WebKit/Source/core/page/EventSource.cpp
@@ -61,7 +61,7 @@
 const unsigned long long EventSource::defaultReconnectDelay = 3000;
 
 inline EventSource::EventSource(ExecutionContext* context, const KURL& url, const EventSourceInit& eventSourceInit)
-    : ContextLifecycleObserver(context)
+    : ActiveDOMObject(context)
     , m_url(url)
     , m_withCredentials(eventSourceInit.withCredentials())
     , m_state(CONNECTING)
@@ -91,7 +91,9 @@
     }
 
     EventSource* source = new EventSource(context, fullURL, eventSourceInit);
+
     source->scheduleInitialConnect();
+    source->suspendIfNeeded();
     return source;
 }
 
@@ -193,8 +195,7 @@
     if (m_parser)
         m_parser->stop();
 
-    // Stop trying to reconnect if EventSource was explicitly closed
-    // or if ContextLifecycleObserver::stop() was called.
+    // Stop trying to reconnect if EventSource was explicitly closed or if ActiveDOMObject::stop() was called.
     if (m_connectTimer.isActive()) {
         m_connectTimer.stop();
     }
@@ -214,7 +215,7 @@
 
 ExecutionContext* EventSource::executionContext() const
 {
-    return ContextLifecycleObserver::executionContext();
+    return ActiveDOMObject::executionContext();
 }
 
 void EventSource::didReceiveResponse(unsigned long, const ResourceResponse& response, PassOwnPtr<WebDataConsumerHandle> handle)
@@ -335,7 +336,7 @@
     dispatchEvent(Event::create(EventTypeNames::error));
 }
 
-void EventSource::contextDestroyed()
+void EventSource::stop()
 {
     close();
 }
@@ -349,7 +350,7 @@
 {
     visitor->trace(m_parser);
     RefCountedGarbageCollectedEventTargetWithInlineData::trace(visitor);
-    ContextLifecycleObserver::trace(visitor);
+    ActiveDOMObject::trace(visitor);
     EventSourceParser::Client::trace(visitor);
 }