Replace GrGLInterface's function pointers with std::functions

include/private/SkTLogic.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  *
  * This header provides some of the helpers (like std::enable_if_t) which will
  * become available with C++14 in the type_traits header (in the skstd
  * namespace). This header also provides several Skia specific additions such
@@ skipping 12 matching lines @@
 
 namespace skstd {
 
 template <bool B> using bool_constant = std::integral_constant<bool, B>;
 
 template <bool B, typename T, typename F> using conditional_t = typename std::conditional<B, T, F>::type;
 template <bool B, typename T = void> using enable_if_t = typename std::enable_if<B, T>::type;
 
 template <typename T> using remove_const_t = typename std::remove_const<T>::type;
 template <typename T> using remove_volatile_t = typename std::remove_volatile<T>::type;
 template <typename T> using remove_cv_t = typename std::remove_cv<T>::type;

[robertphillips, 2016/02/08 13:13:16]

remove the new spaces ?

[bsalomon, 2016/02/08 14:52:54]

Done.

-template <typename T> using remove_pointer_t = typename std::remove_pointer<T>::type;
+template <typename T> using     remove_pointer_t = typename std::remove_pointer<T>::type;
 template <typename T> using remove_reference_t = typename std::remove_reference<T>::type;
 template <typename T> using remove_extent_t = typename std::remove_extent<T>::type;
 
 // template<typename R, typename... Args> struct is_function<
 //     R [calling-convention] (Args...[, ...]) [const] [volatile] [&|&&]> : std::true_type {};
 // The cv and ref-qualified versions are strange types we're currently avoiding, so not supported.
 // These aren't supported in msvc either until vs2015u2.
 // On all platforms, variadic functions only exist in the c calling convention.
 // mcvc 2013 introduced __vectorcall, but it wan't until 2015 that it was added to is_function.
 template <typename> struct is_function : std::false_type {};
@@ skipping 73 matching lines @@
 template <typename D, typename S> using same_volatile_t = typename same_volatile<D, S>::type;
 template <typename D, typename S> using same_cv = copy_cv<skstd::remove_cv_t<D>, S>;
 template <typename D, typename S> using same_cv_t = typename same_cv<D, S>::type;
 
 }  // namespace sknonstd
 
 // Just a pithier wrapper for enable_if_t.
 #define SK_WHEN(condition, T) skstd::enable_if_t<!!(condition), T>
 
 #endif