Fix one remaining misuse of FX_WSTRC on FX_WCHAR* vars.

Fix one remaining misuse of FX_WSTRC on FX_WCHAR* vars.

FX_WSTRC is only valid on arrays, not pointers. In this code it was
being passed a pointer to a URL. This was found when integrating a
change to FX_WSTRC that disallows pointer arguments.

The consequence of this bug is that the URL will end up with incorrect
lengths. It will be one character long in 32-bit builds, and three
characters long in 64-bit builds (sizeof(WCHAR*)-1).

R=bo_xu@foxitsoftware.com

Committed: https://pdfium.googlesource.com/pdfium/+/bbd41bbd5e4ae9ca4f4a800c955471e41a947d98

[brucedawson, 2015-01-05 19:13:32]

brucedawson@chromium.org changed reviewers:
+ bo_xu@foxitsoftware.com

[brucedawson, 2015-01-05 19:13:32]

I missed this one last time.

This is particularly scary -- the URL would be severely truncated. Why was this
not noticed?

[Bo Xu, 2015-01-05 19:43:18]

On 2015/01/05 19:13:32, brucedawson wrote:
> I missed this one last time.
> 
> This is particularly scary -- the URL would be severely truncated. Why was
this
> not noticed?

LGTM. Looks like all these bugs have been identified.

[brucedawson, 2015-01-05 19:45:51]

Committed patchset #1 (id:1) manually as
bbd41bbd5e4ae9ca4f4a800c955471e41a947d98 (presubmit successful).