Add an Error class for ServiceWorkers

Source/modules/serviceworkers/ServiceWorkerError.cpp

Index: Source/modules/serviceworkers/ServiceWorkerError.cpp
diff --git a/Source/core/html/HTMLMediaSource.cpp b/Source/modules/serviceworkers/ServiceWorkerError.cpp
similarity index 84%
copy from Source/core/html/HTMLMediaSource.cpp
copy to Source/modules/serviceworkers/ServiceWorkerError.cpp
index 7221cfeaf34ed4e40fd174029a3fa66a6d8dd411..9e927a0d6cad84cf21eaa8911ab1c21031ec0e72 100644
--- a/Source/core/html/HTMLMediaSource.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerError.cpp
@@ -29,16 +29,19 @@
  */
 
 #include "config.h"
-#include "core/html/HTMLMediaSource.h"
+#include "ServiceWorkerError.h"
 
+using WebKit::WebServiceWorkerError;

[abarth-chromium, 2013/10/25 15:37:16]

Why do you have this using directive and then use the type with the explicit
WebKit:: namespace.  Either is fine, but doing both is redundant.

[alecflett, 2013/10/25 23:05:33]

Done. (oops, oversight)

 namespace WebCore {
 
-URLRegistry* HTMLMediaSource::s_registry = 0;
-
-void HTMLMediaSource::setRegistry(URLRegistry* registry)
+String ServiceWorkerError::getErrorString(WebKit::WebServiceWorkerError::ErrorType type)
 {
-    ASSERT(!s_registry);
-    s_registry = registry;
+    switch (type) {
+    case WebServiceWorkerError::DisabledError:
+        return "DisabledError";
+    default:
+        ASSERT_NOT_REACHED();
+    }
 }
 
 }