Change unsigned long to uint64_t in third_party/blink/public/web/web_pepper_socket_client.h

- unsigned long -> uint64_t for buffer amount to make a consistence with //blink & //ppapi
- unsigned short -> uint16_t, size_t -> unsigned
- Reference: https://google.github.io/styleguide/cppguide.html#Integer_Types

Bug: 930252
Change-Id: Ia5cc8df0fc109ccfc86c208474bb36f3f7e95aa2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1530212
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Miyoung Shin <myid.shin@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#642264}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 7caefcaeb6f5181cad67c44e5fd7bc506a816d70
2 files changed