Enforce referrer policies for workers

Source/core/loader/WorkerThreadableLoader.h

Index: Source/core/loader/WorkerThreadableLoader.h
diff --git a/Source/core/loader/WorkerThreadableLoader.h b/Source/core/loader/WorkerThreadableLoader.h
index 735b4d63b4bec362e8404feb6946be5df5780ef5..7ea182f5342e3c5d365fce32753da1b1ad2dcaae 100644
--- a/Source/core/loader/WorkerThreadableLoader.h
+++ b/Source/core/loader/WorkerThreadableLoader.h
@@ -35,6 +35,7 @@
 #include "core/loader/ThreadableLoaderClient.h"
 #include "core/loader/ThreadableLoaderClientWrapper.h"
 #include "platform/heap/Handle.h"
+#include "platform/weborigin/Referrer.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
@@ -87,7 +88,7 @@ namespace blink {
         class MainThreadBridge final : public ThreadableLoaderClient {
         public:
             // All executed on the worker context's thread.
-            MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, PassRefPtr<WorkerLoaderProxy>, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&, const String& outgoingReferrer);
+            MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, PassRefPtr<WorkerLoaderProxy>, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&, const ReferrerPolicy, const String& outgoingReferrer);
             void overrideTimeout(unsigned long timeoutMilliseconds);
             void cancel();
             void destroy();
@@ -100,7 +101,7 @@ namespace blink {
             void mainThreadDestroy(ExecutionContext*);
             virtual ~MainThreadBridge();
 
-            void mainThreadCreateLoader(PassOwnPtr<CrossThreadResourceRequestData>, ThreadableLoaderOptions, ResourceLoaderOptions, const String& outgoingReferrer, ExecutionContext*);
+            void mainThreadCreateLoader(PassOwnPtr<CrossThreadResourceRequestData>, ThreadableLoaderOptions, ResourceLoaderOptions, const ReferrerPolicy, const String& outgoingReferrer, ExecutionContext*);
             void mainThreadOverrideTimeout(unsigned long timeoutMilliseconds, ExecutionContext*);
             void mainThreadCancel(ExecutionContext*);
             virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;