Add WebServiceWorkerErrorType::ErrorTypeAbort

This is needed for removing --enable-service-worker
(https://codereview.chromium.org/339973003/).  Chromium-side currently
returns ErrorTypeDisabled for both "SW is disabled" and "SWContextCore
was destroyed during shutdown" when handling a registration request.
Since the former will no longer happen, add a generic operation aborted
error for the latter.

BUG=365201

Review URL: https://codereview.chromium.org/342863003

git-svn-id: svn://svn.chromium.org/blink/trunk@176500 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -43,6 +43,8 @@ PassRefPtrWillBeRawPtr<DOMException> ServiceWorkerError::from(ScriptPromiseResol
     switch (webError->errorType) {
     case WebServiceWorkerError::ErrorTypeDisabled:
         return DOMException::create(NotSupportedError, "Service Worker support is disabled.");
+    case WebServiceWorkerError::ErrorTypeAbort:
+        return DOMException::create(AbortError, "The Service Worker operation was aborted.");
     case WebServiceWorkerError::ErrorTypeSecurity:
         return DOMException::create(SecurityError, "The Service Worker security policy prevented an action.");
     case WebServiceWorkerError::ErrorTypeInstall:

third_party/WebKit/public/platform/WebServiceWorkerError.h

@@ -38,6 +38,7 @@ namespace blink {
 struct WebServiceWorkerError {
     enum ErrorType {
         ErrorTypeDisabled = 0,
+        ErrorTypeAbort,
         ErrorTypeSecurity,
         ErrorTypeInstall,
         ErrorTypeActivate,