mini_chromium: remove implicit_cast

base/basictypes.h

Index: base/basictypes.h
diff --git a/base/basictypes.h b/base/basictypes.h
index 87a88790d6026752607635183f8337d431b821e3..9ba0db2611d76dd33891480471f823cec7acb618 100644
--- a/base/basictypes.h
+++ b/base/basictypes.h
@@ -44,11 +44,6 @@ char (&ArraySizeHelper(const T (&array)[N]))[N];
     ((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");