Fix InstallPhaseEvent so that instances can be passed to script.

Events need to provide the V8Event binding their interface name (by
overriding Event::interfaceName) and set up wrapper info (by calling
ScriptWrappable::init.) Make InstallPhaseEvent follow the rules.

BUG=356021

Review URL: https://codereview.chromium.org/216603003

git-svn-id: svn://svn.chromium.org/blink/trunk@170322 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -31,8 +31,8 @@
 #include "config.h"
 #include "InstallPhaseEvent.h"
 
+#include "bindings/v8/ScriptWrappable.h"
 #include "modules/serviceworkers/WaitUntilObserver.h"
-#include "platform/NotImplemented.h"
 
 namespace WebCore {
 
@@ -57,12 +57,19 @@ void InstallPhaseEvent::waitUntil(const ScriptValue& value)
 
 InstallPhaseEvent::InstallPhaseEvent()
 {
+    ScriptWrappable::init(this);
 }
 
 InstallPhaseEvent::InstallPhaseEvent(const AtomicString& type, const EventInit& initializer, PassRefPtr<WaitUntilObserver> observer)
     : Event(type, initializer)
     , m_observer(observer)
 {
+    ScriptWrappable::init(this);
+}
+
+const AtomicString& InstallPhaseEvent::interfaceName() const
+{
+    return EventNames::InstallPhaseEvent;
 }
 
 void InstallPhaseEvent::trace(Visitor* visitor)

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

@@ -47,6 +47,7 @@ public:
 
     void waitUntil(const ScriptValue&);
 
+    virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual void trace(Visitor*) OVERRIDE;
 
 protected: