Remove callers of mojo::Array<size_t> constructor in favor of ::New

Remove callers of mojo::Array<size_t> constructor in favor of ::New

This creates an ambiguity with Array(0) if we try to add a
mojo::Array(std::nullptr_t) constructor. This just removes callers, it
doesn't remove the constructor itself. I'll remove the constructor after
verifying downstream consumers won't be broken.

R=viettrungluu@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/dc335c09730683e61693b125d0f95cef1d6da858

[jamesr, 2015-10-09 17:43:37]

jamesr@chromium.org changed reviewers:
+ viettrungluu@chromium.org

[viettrungluu, 2015-10-09 18:27:02]

lgtm

[jamesr, 2015-10-10 00:23:35]

Committed patchset #1 (id:1) manually as
dc335c09730683e61693b125d0f95cef1d6da858 (presubmit successful).