Revert of Use a standard message box for DesktopCastingWarningView.

chrome/browser/ui/simple_message_box.h

Index: chrome/browser/ui/simple_message_box.h
diff --git a/chrome/browser/ui/simple_message_box.h b/chrome/browser/ui/simple_message_box.h
index c7585a121c911daedd6f6daf979d5df0cff45508..4918861fff8a8c737724eaa839542003b6ba471c 100644
--- a/chrome/browser/ui/simple_message_box.h
+++ b/chrome/browser/ui/simple_message_box.h
@@ -5,7 +5,6 @@
 #ifndef CHROME_BROWSER_UI_SIMPLE_MESSAGE_BOX_H_
 #define CHROME_BROWSER_UI_SIMPLE_MESSAGE_BOX_H_
 
-#include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -62,10 +61,6 @@
                                               const base::string16& yes_text,
                                               const base::string16& no_text);
 
-// Closes the current message box, if any, accepting or declining based on
-// |accept|. Returns whether there was a message box showing.
-bool CloseMessageBoxForTest(bool accept) WARN_UNUSED_RESULT;
-
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_SIMPLE_MESSAGE_BOX_H_