Fixes to build with MSVC 2019

When building with MSVC (using 'is_clang=false') various errors are
encountered. This fixes:

- multiple tests/end2end/ColorStateTests.cpp(309): error C2039:
  'transform': is not a member of 'std'

- dawn_wire/server/Server.h(171): error C2248:
  'dawn_wire::server::MapUserdata::MapUserdata': cannot access private
  member declared in class 'dawn_wire::server::MapUserdata'

- variants of the above in Server.h for all the other CallbackUserdata
  subclasses

Bug: dawn:602

Change-Id: I01b1db3fbf67ae170b21a7d890af6162b82a1725
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/37420
Commit-Queue: Carl Woffenden <cwoffenden@gmail.com>
Reviewed-by: Austin Eng <enga@chromium.org>

src/dawn_wire/server/Server.h

@@ -53,8 +53,6 @@ namespace dawn_wire { namespace server {
         Server* const server;
         std::weak_ptr<bool> const serverIsAlive;
 
-      private:
-        friend class Server;
         CallbackUserdata() = delete;
         CallbackUserdata(Server* server, const std::shared_ptr<bool>& serverIsAlive)
             : server(server), serverIsAlive(serverIsAlive) {

src/tests/end2end/ColorStateTests.cpp

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include <algorithm>
 #include <array>
 #include <cmath>