Remove all remaining traces of MessageLoopProxy.

ios/chrome/browser/net/ios_chrome_url_request_context_getter.h

Index: ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
diff --git a/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h b/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
index 9e8cc8fd4953c71c1c706f22e7ae102f22314f27..c1205259b6f21e6eee2c5bad583cb0387f59957d 100644
--- a/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
+++ b/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
@@ -30,7 +30,7 @@ class IOSChromeURLRequestContextGetter : public net::URLRequestContextGetter {
 
   // Note that GetURLRequestContext() can only be called from the IO
   // thread (it will assert otherwise).
-  // GetIOMessageLoopProxy however can be called from any thread.
+  // GetIOTaskRunner however can be called from any thread.
   //
   // net::URLRequestContextGetter implementation.
   net::URLRequestContext* GetURLRequestContext() override;