Mojo C++ bindings: expose public <struct>DataView and StringDataView.

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

Index: mojo/public/cpp/bindings/lib/serialization_util.h
diff --git a/mojo/public/cpp/bindings/lib/serialization_util.h b/mojo/public/cpp/bindings/lib/serialization_util.h
index 56f5e761daffe43fbfc99ce09092a00612206a47..8e926cc5e832803781cf6b8e9a026e4be8ced18f 100644
--- a/mojo/public/cpp/bindings/lib/serialization_util.h
+++ b/mojo/public/cpp/bindings/lib/serialization_util.h
@@ -102,10 +102,12 @@ inline void InterfaceDataToPointer(Interface_Data* input,
       input->version));
 }
 
+// TODO(yzshen): Unify StructTraits::Read*() methods and remove
+// HasReadFromDataViewMethod.
 template <typename T>
-struct HasReadFromRawDataMethod {
+struct HasReadFromDataViewMethod {
   template <typename U>
-  static char Test(decltype(U::ReadFromRawData)*);
+  static char Test(decltype(U::ReadFromDataView)*);
   template <typename U>
   static int Test(...);
   static const bool value = sizeof(Test<T>(0)) == sizeof(char);