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

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h

Index: third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
diff --git a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
index 78a46de3d3d88cc7a9cf2d1de609736978b457a9..c40cd4ae0fb59324ecc1f638d032aa11ef5814d9 100644
--- a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
+++ b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
@@ -62,6 +62,7 @@ public:
     // WebEmbeddedWorker overrides.
     void startWorkerContext(const WebEmbeddedWorkerStartData&) override;
     void terminateWorkerContext() override;
+    void resumeAfterDownload() override;
     void attachDevTools(const WebString& hostId, int sessionId) override;
     void reattachDevTools(const WebString& hostId, int sessionId, const WebString& savedState) override;
     void detachDevTools() override;
@@ -121,11 +122,16 @@ private:
     bool m_askedToTerminate;
 
     enum WaitingForDebuggerState {
-        WaitingForDebuggerBeforeLoadingScript,
-        WaitingForDebuggerAfterScriptLoaded,
+        WaitingForDebugger,
         NotWaitingForDebugger
     };
 
+    enum {
+        DontPauseAfterDownload,
+        DoPauseAfterDownload,
+        IsPausedAfterDownload
+    } m_pauseAfterDownloadState;
+
     WaitingForDebuggerState m_waitingForDebuggerState;
 };