mini_chromium: remove implicit_cast

base/basictypes.h

 // Copyright 2006-2008 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 MINI_CHROMIUM_BASE_BASICTYPES_H_
 #define MINI_CHROMIUM_BASE_BASICTYPES_H_
 
 #include <string.h>
 #include <sys/types.h>
 
@@ skipping 26 matching lines @@
 
 template <typename T, size_t N>
 char (&ArraySizeHelper(const T (&array)[N]))[N];
 
 #define arraysize(array) (sizeof(ArraySizeHelper(array)))
 
 #define ARRAYSIZE_UNSAFE(a) \
     ((sizeof(a) / sizeof(*(a))) / \
      static_cast<size_t>(!(sizeof(a) % sizeof(*(a)))))
 
-template<typename To, typename From>
-inline To implicit_cast(const From& f) {
-  return f;
-}
-
 template <typename Dest, typename Source>
 inline Dest bit_cast(const Source& source) {
   static_assert(sizeof(Dest) == sizeof(Source), "sizes must be equal");
 
   Dest dest;
   memcpy(&dest, &source, sizeof(dest));
   return dest;
 }
 
 template<typename T>
 inline void ignore_result(const T&) {
 }
 
 #endif  // MINI_CHROMIUM_BASE_BASICTYPES_H_