Dispatch the ServiceWorker "activate" event during activation

Source/web/ServiceWorkerGlobalScopeClientImpl.cpp

Index: Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
index 36bb02a71a2b5bfafef830dde7f3479f1115f80a..b75afb91acd6e706c52b6279bb791a4336e20d56 100644
--- a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
@@ -48,6 +48,12 @@ ServiceWorkerGlobalScopeClientImpl::~ServiceWorkerGlobalScopeClientImpl()
 {
 }
 
+void ServiceWorkerGlobalScopeClientImpl::didHandleActivateEvent(int eventID, WebServiceWorkerEventResult result)
+{
+    if (m_client)
+        m_client->didHandleActivateEvent(eventID, result);

[kinuko, 2014/03/28 05:24:45]

nit: looks like our current assumption is m_client is always non-null, probably
we can remove the if (m_client)

(And perhaps can have ASSERT(m_client) in ctor of this class)

+}
+
 void ServiceWorkerGlobalScopeClientImpl::didHandleInstallEvent(int installEventID, WebServiceWorkerEventResult result)
 {
     m_client->didHandleInstallEvent(installEventID, result);