Printing: Convert PrintingContext into an interface implemented by the separate

chrome/browser/printing/print_job_unittest.cc

Index: chrome/browser/printing/print_job_unittest.cc
diff --git a/chrome/browser/printing/print_job_unittest.cc b/chrome/browser/printing/print_job_unittest.cc
index fb737bcb0965d100ae059086647ee9bb25c728ea..757d6c8aec6a7104cd3b7bed644c602f7e3904d4 100644
--- a/chrome/browser/printing/print_job_unittest.cc
+++ b/chrome/browser/printing/print_job_unittest.cc
@@ -44,8 +44,8 @@ class TestOwner : public printing::PrintJobWorkerOwner {
     // That's fine for testing. It is actually simulating PrinterQuery behavior.
     TestPrintJobWorker* worker(new TestPrintJobWorker(new_owner));
     EXPECT_TRUE(worker->Start());
-    worker->printing_context().UseDefaultSettings();
-    settings_ = worker->printing_context().settings();
+    worker->printing_context()->UseDefaultSettings();
+    settings_ = worker->printing_context()->settings();
     return worker;
   }
   virtual MessageLoop* message_loop() {