Replace "nested message loop" with "nested run loop" in comments.

content/renderer/render_frame_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1361 matching lines @@
   PreviewsState previews_state_;
 
   // Effective connection type when the document of this frame was fetched.
   // TODO(sclittle): Consider moving this into Blink to be owned and managed by
   // LocalFrame or another class around there.
   blink::WebEffectiveConnectionType effective_connection_type_;
 
   // Whether or not this RenderFrame is currently pasting.
   bool is_pasting_;
 
-  // Whether we must stop creating nested message loops for modal dialogs. This
+  // Whether we must stop creating nested run loops for modal dialogs. This
   // is necessary because modal dialogs have a ScopedPageLoadDeferrer on the
   // stack that interferes with swapping out.
   bool suppress_further_dialogs_;
 
   // The current and pending file chooser completion objects. If the queue is
   // nonempty, the first item represents the currently running file chooser
   // callback, and the remaining elements are the other file chooser completion
   // still waiting to be run (in order).
   struct PendingFileChooser;
   std::deque<std::unique_ptr<PendingFileChooser>> file_chooser_completions_;
@@ skipping 85 matching lines @@
   std::vector<media::RoutingTokenCallback> pending_routing_token_callbacks_;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_