Implement ServiceWorkerClient attributes [1/3]

Source/modules/serviceworkers/ServiceWorkerContainer.cpp

Index: Source/modules/serviceworkers/ServiceWorkerContainer.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerContainer.cpp b/Source/modules/serviceworkers/ServiceWorkerContainer.cpp
index fbdad145575cfa45c5c437a9ca819ed15cbf59f9..ef007e397fcfc9306bf40e87535bb9708939c26b 100644
--- a/Source/modules/serviceworkers/ServiceWorkerContainer.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerContainer.cpp
@@ -37,6 +37,7 @@
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "bindings/core/v8/SerializedScriptValueFactory.h"
 #include "core/dom/DOMException.h"
+#include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/MessagePort.h"
@@ -49,6 +50,7 @@
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebServiceWorker.h"
+#include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerProvider.h"
 #include "public/platform/WebServiceWorkerRegistration.h"
 #include "public/platform/WebString.h"
@@ -280,6 +282,24 @@ const AtomicString& ServiceWorkerContainer::interfaceName() const
     return EventTargetNames::ServiceWorkerContainer;
 }
 
+bool ServiceWorkerContainer::getClientInfo(WebServiceWorkerClientInfo* info)
+{
+    ExecutionContext* context = executionContext();
+    if (!context || !context->isDocument())

[nhiroki, 2014/12/08 04:07:06]

According to the ongoing discussion[1], SharedWorker (and DedicatedWorker?)
should also be treated as ServiceWorkerClient. Can we have a fixme comment for
that?

[1] https://github.com/slightlyoff/ServiceWorker/issues/423

[Kunihiko Sakamoto, 2014/12/08 04:45:32]

Done.

+        return false;
+    Document* document = toDocument(context);
+    info->visibilityState = document->visibilityState();
+    info->focused = document->hasFocus();
+    info->url = document->url();
+    if (!document->frame())
+        info->frameType = WebURLRequest::FrameTypeNone;
+    else if (document->frame()->isMainFrame())
+        info->frameType = WebURLRequest::FrameTypeTopLevel;
+    else
+        info->frameType = WebURLRequest::FrameTypeNested;
+    return true;
+}
+
 ServiceWorkerContainer::ServiceWorkerContainer(ExecutionContext* executionContext)
     : ContextLifecycleObserver(executionContext)
     , m_provider(0)