ServiceWorker: Implement navigate() method in WindowClient (blink side).

Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp

Index: Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp b/Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp
index 6d463687cb700551454d8d8df8ebebc0cf40e520..c206772d2fa0596d194d11b3f4081d0d74b7364a 100644
--- a/Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerWindowClient.cpp
@@ -10,6 +10,8 @@
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/page/PageVisibilityState.h"
+#include "core/workers/WorkerGlobalScope.h"
+#include "core/workers/WorkerLocation.h"
 #include "modules/serviceworkers/ServiceWorkerError.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
 #include "public/platform/WebString.h"
@@ -58,6 +60,26 @@ ScriptPromise ServiceWorkerWindowClient::focus(ScriptState* scriptState)
     return promise;
 }
 
+ScriptPromise ServiceWorkerWindowClient::navigate(ScriptState* scriptState, const String& url)
+{
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+    ExecutionContext* context = scriptState->executionContext();
+
+    KURL parsedUrl = KURL(toWorkerGlobalScope(context)->location()->url(), url);
+    if (!parsedUrl.isValid() || parsedUrl.protocolIsAbout()) {
+        resolver->reject(V8ThrowException::createTypeError(scriptState->isolate(), "'" + url + "' is not a valid URL."));
+        return promise;
+    }
+    if (!context->securityOrigin()->canDisplay(parsedUrl)) {
+        resolver->reject(DOMException::create(SecurityError, "'" + parsedUrl.elidedString() + "' cannot navigate."));
+        return promise;
+    }
+
+    ServiceWorkerGlobalScopeClient::from(context)->navigate(uuid(), parsedUrl, new CallbackPromiseAdapter<ServiceWorkerWindowClient, ServiceWorkerError>(resolver));
+    return promise;
+}
+
 DEFINE_TRACE(ServiceWorkerWindowClient)
 {
     ServiceWorkerClient::trace(visitor);