Remove legacy StartsWithASCII function.

ui/base/x/x11_util.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.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "ui/base/x/x11_util.h"
 
@@ skipping 1233 matching lines @@
     if (name == "Blackbox")
       return WM_BLACKBOX;
     if (name == "Compiz" || name == "compiz")
       return WM_COMPIZ;
     if (name == "e16" || name == "Enlightenment")
       return WM_ENLIGHTENMENT;
     if (name == "Fluxbox")
       return WM_FLUXBOX;
     if (name == "i3")
       return WM_I3;
-    if (base::StartsWithASCII(name, "IceWM", true))
+    if (base::StartsWith(name, "IceWM", base::CompareCase::SENSITIVE))
       return WM_ICE_WM;
     if (name == "ion3")
       return WM_ION3;
     if (name == "KWin")
       return WM_KWIN;
     if (name == "matchbox")
       return WM_MATCHBOX;
     if (name == "Metacity")
       return WM_METACITY;
     if (name == "Mutter (Muffin)")
@@ skipping 212 matching lines @@
       << "request_code " << static_cast<int>(error_event.request_code) << ", "
       << "minor_code " << static_cast<int>(error_event.minor_code)
       << " (" << request_str << ")";
 }
 
 // ----------------------------------------------------------------------------
 // End of x11_util_internal.h
 
 
 }  // namespace ui