Remove all remaining traces of MessageLoopProxy.

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 996adff514c8eea18a9dfecb6ed8838154653a4e..a9a994ef7f424f6808b6f2e489fe1886751ffefd 100644
--- a/chrome/renderer/chrome_mock_render_thread.h
+++ b/chrome/renderer/chrome_mock_render_thread.h
@@ -19,13 +19,12 @@ class ChromeMockRenderThread : public content::MockRenderThread {
   ~ChromeMockRenderThread() override;
 
   // content::RenderThread overrides.
-  scoped_refptr<base::SingleThreadTaskRunner> GetIOMessageLoopProxy() override;
+  scoped_refptr<base::SingleThreadTaskRunner> GetIOTaskRunner() override;
 
   //////////////////////////////////////////////////////////////////////////
   // The following functions are called by the test itself.
 
-  // Set IO message loop proxy.
-  void set_io_message_loop_proxy(
+  void set_io_task_runner(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
  private: