Remove black magic and >100 lines. Unhook a lot of dead code.

chrome/browser/printing/print_job_worker.h

Index: chrome/browser/printing/print_job_worker.h
===================================================================
--- chrome/browser/printing/print_job_worker.h	(revision 9138)
+++ chrome/browser/printing/print_job_worker.h	(working copy)
@@ -25,7 +25,7 @@
 // PrintJob always outlives its worker instance.
 class PrintJobWorker : public base::Thread {
  public:
-  PrintJobWorker(PrintJobWorkerOwner* owner);
+  explicit PrintJobWorker(PrintJobWorkerOwner* owner);
   ~PrintJobWorker();
 
   void SetNewOwner(PrintJobWorkerOwner* new_owner);
@@ -58,6 +58,10 @@
   // ALL_PAGES_REQUESTED notification once done.
   void RequestMissingPages();
 
+ protected:
+  // Retrieves the context for testing only.
+  PrintingContext& printing_context() { return printing_context_; }
+
  private:
   // The shared NotificationService service can only be accessed from the UI
   // thread, so this class encloses the necessary information to send the