chrome: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

chrome/renderer/chrome_mock_render_thread.h

Index: chrome/renderer/chrome_mock_render_thread.h
diff --git a/chrome/renderer/chrome_mock_render_thread.h b/chrome/renderer/chrome_mock_render_thread.h
index f6e460f8e254a9b6dd20592b911252038606ca25..f15d5844a074f04509746583afb97cf3855e599e 100644
--- a/chrome/renderer/chrome_mock_render_thread.h
+++ b/chrome/renderer/chrome_mock_render_thread.h
@@ -25,7 +25,7 @@ class ChromeMockRenderThread : 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);
 
  private:
   // Overrides base class implementation to add custom handling for
@@ -41,7 +41,7 @@ class ChromeMockRenderThread : public content::MockRenderThread {
                                 int* port_id);
 #endif
 
-  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMockRenderThread);
 };