components: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

components/printing/test/print_mock_render_thread.h

Index: components/printing/test/print_mock_render_thread.h
diff --git a/components/printing/test/print_mock_render_thread.h b/components/printing/test/print_mock_render_thread.h
index fdec4b289251d5aea1af953aff5b4b6485e9e838..a5efe2ed4706bc943ff57dda2593dd7c9de4102f 100644
--- a/components/printing/test/print_mock_render_thread.h
+++ b/components/printing/test/print_mock_render_thread.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/compiler_specific.h"
+#include "base/single_thread_task_runner.h"
 #include "content/public/test/mock_render_thread.h"
 
 namespace base {
@@ -36,7 +37,7 @@ class PrintMockRenderThread : public content::MockRenderThread {
 
   // Set IO message loop proxy.
   void set_io_message_loop_proxy(
-      const scoped_refptr<base::MessageLoopProxy>& proxy);
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
 #if defined(ENABLE_PRINTING)
   // Returns the pseudo-printer instance.
@@ -101,7 +102,7 @@ class PrintMockRenderThread : public content::MockRenderThread {
   int print_preview_pages_remaining_;
 #endif
 
-  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintMockRenderThread);
 };