service worker: use 200 OK for update requests even in the no update case

third_party/WebKit/public/web/WebEmbeddedWorkerStartData.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
 #define WebEmbeddedWorkerStartData_h
 
 #include "WebContentSecurityPolicy.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 #include "public/web/WebSettings.h"
 
 namespace blink {
 
 struct WebEmbeddedWorkerStartData {
+    enum PauseAfterDownloadMode {
+        DontPauseAfterDownload,
+        PauseAfterDownload,
+    };
     enum WaitForDebuggerMode {
         DontWaitForDebugger,
         WaitForDebugger
     };
 
     WebURL scriptURL;
     WebString userAgent;
+    PauseAfterDownloadMode pauseAfterDownloadMode;
     WaitForDebuggerMode waitForDebuggerMode;
     WebSettings::V8CacheOptions v8CacheOptions;
 
     WebEmbeddedWorkerStartData()
-        : waitForDebuggerMode(DontWaitForDebugger)
-        , v8CacheOptions(WebSettings::V8CacheOptionsDefault) { }
+        : pauseAfterDownloadMode(DontPauseAfterDownload)
+        , waitForDebuggerMode(DontWaitForDebugger)
+        , v8CacheOptions(WebSettings::V8CacheOptionsDefault)
+    {
+    }
 };
 
 } // namespace blink
 
 #endif // WebEmbeddedWorkerStartData_h