Remove tab parameter from GrGLSLMulVarBy4f function

Remove tab parameter from GrGLSLMulVarBy4f function

With pretty printing of shader code, there is no longer a need to explictily
have tabs in our code.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/089f8de82d6c342faa9170d8c19d8504177bf5fb

[egdaniel, 2014-10-09 17:08:27]

egdaniel@google.com changed reviewers:
+ joshualitt@chromium.org, robertphillips@google.com

[egdaniel, 2014-10-09 17:08:31]

egdaniel@google.com changed required reviewers:
+ joshualitt@chromium.org

[egdaniel, 2014-10-09 17:08:32]

Rob feel free to ignore, I just wanted to test out Ravi's new '*' feature (or
l-g-t-m it and see if it fails).

[joshua.litt, 2014-10-09 17:09:34]

On 2014/10/09 17:08:32, egdaniel wrote:
> Rob feel free to ignore, I just wanted to test out Ravi's new '*' feature (or
> l-g-t-m it and see if it fails).

lgtm

[egdaniel, 2014-10-09 17:20:31]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2014-10-09 17:21:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/648463002/100001

[commit-bot: I haz the power, 2014-10-09 17:35:02]

Committed patchset #2 (id:100001) as 089f8de82d6c342faa9170d8c19d8504177bf5fb