Mojo C++ bindings: switch the existing usage of StructTraits to use the new data view interface.

mojo/public/cpp/bindings/lib/serialization_util.h

 // Copyright 2013 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_SERIALIZATION_UTIL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_SERIALIZATION_UTIL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 84 matching lines @@
 
 template <typename T>
 inline void InterfaceDataToPointer(Interface_Data* input,
                                    InterfacePtr<T>* output,
                                    SerializationContext* context) {
   output->Bind(InterfacePtrInfo<T>(
       context->handles.TakeHandleAs<mojo::MessagePipeHandle>(input->handle),
       input->version));
 }
 
-// TODO(yzshen): Unify StructTraits::Read*() methods and remove
-// HasReadFromDataViewMethod.
-template <typename T>
-struct HasReadFromDataViewMethod {
-  template <typename U>
-  static char Test(decltype(U::ReadFromDataView)*);
-  template <typename U>
-  static int Test(...);
-  static const bool value = sizeof(Test<T>(0)) == sizeof(char);
-
- private:
-  EnsureTypeIsComplete<T> check_t_;
-};
-
 template <typename T>
 struct HasIsNullMethod {
   template <typename U>
   static char Test(decltype(U::IsNull)*);
   template <typename U>
   static int Test(...);
   static const bool value = sizeof(Test<T>(0)) == sizeof(char);
 
  private:
   EnsureTypeIsComplete<T> check_t_;
@@ skipping 80 matching lines @@
 ReturnType CallWithContext(ReturnType (*f)(ParamType),
                            MaybeConstUserType& input,
                            void* context) {
   return f(input);
 }
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_SERIALIZATION_UTIL_H_