ui/base: Move message_box_win.{h,cc} to ui/base/win.

base/base_switches.cc

 // Copyright (c) 2011 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 "base/base_switches.h"
 
 namespace switches {
 
 // If the program includes base/debug/debug_on_start_win.h, the process will
 // (on Windows only) start the JIT system-registered debugger on itself and
 // will wait for 60 seconds for the debugger to attach to itself. Then a break
 // point will be hit.
 const char kDebugOnStart[]                  = "debug-on-start";
 
 // Disables the crash reporting.
 const char kDisableBreakpad[]               = "disable-breakpad";
 
 // Enable DCHECKs in release mode.
 const char kEnableDCHECK[]                  = "enable-dcheck";
 
 // Generates full memory crash dump.
 const char kFullMemoryCrashReport[]         = "full-memory-crash-report";
 
 // Suppresses all error dialogs when present.
 const char kNoErrorDialogs[]                = "noerrdialogs";
 
-// Disable ui::MessageBox.  This is useful when running as part of scripts that
-// do not have a user interface.
-const char kNoMessageBox[]                  = "no-message-box";
-
 // When running certain tests that spawn child processes, this switch indicates
 // to the test framework that the current process is a child process.
 const char kTestChildProcess[]              = "test-child-process";
 
 // Gives the default maximal active V-logging level; 0 is the default.
 // Normally positive values are used for V-logging levels.
 const char kV[]                             = "v";
 
 // Gives the per-module maximal V-logging levels to override the value
 // given by --v.  E.g. "my_module=2,foo*=3" would change the logging
 // level for all code in source files "my_module.*" and "foo*.*"
 // ("-inl" suffixes are also disregarded for this matching).
 //
 // Any pattern containing a forward or backward slash will be tested
 // against the whole pathname and not just the module.  E.g.,
 // "*/foo/bar/*=2" would change the logging level for all code in
 // source files under a "foo/bar" directory.
 const char kVModule[]                       = "vmodule";
 
 // Will wait for 60 seconds for a debugger to come to attach to the process.
 const char kWaitForDebugger[]               = "wait-for-debugger";
 
 }  // namespace switches