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

content/renderer/render_view_browsertest.cc

 // Copyright (c) 2012 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.
 
 #include <stddef.h>
 #include <stdint.h>
 #include <tuple>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 2480 matching lines @@
 }
 
 #endif
 
 TEST_F(DevToolsAgentTest, DevToolsResumeOnClose) {
   Attach();
   EXPECT_FALSE(IsPaused());
   DispatchDevToolsMessage("Debugger.enable",
                           "{\"id\":1,\"method\":\"Debugger.enable\"}");
 
-  // Executing javascript will pause the thread and create nested message loop.
+  // Executing javascript will pause the thread and create nested run loop.
   // Posting task simulates message coming from browser.
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&DevToolsAgentTest::CloseWhilePaused, base::Unretained(this)));
   ExecuteJavaScriptForTests("debugger;");
 
   // CloseWhilePaused should resume execution and continue here.
   EXPECT_FALSE(IsPaused());
   Detach();
 }
@@ skipping 78 matching lines @@
   ExpectPauseAndResume(3);
   blink::WebScriptSource source2(
       WebString::FromUTF8("function func2() { func1(); }; func2();"));
   frame()->GetWebFrame()->ExecuteScriptInIsolatedWorld(17, &source2, 1);
 
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content