Fix some presubmit warnings.

Fix some presubmit warnings.

I found this while running a modified version of v8's tools/presubmit.py
script.

samplecode/SampleImage.cpp does not end with a single new line.
samplecode/SampleImageDir.cpp does not end with a single new line.
src/ports/SkFontHost_sandbox_none.cpp does not end with a single new line.
tests/FlatDataTest.cpp does not end with a single new line.
tests/ImageCacheTest.cpp has trailing whitespaces in line 31.

* Removed three empty files.
* Add single new line to FlatDataTest.cpp
* Removed trailing whitespace in ImageCacheTest.cpp

BUG=None
TEST=None
R=bsalomon@google.com
TBR=bsalomon@google.com

Committed: https://code.google.com/p/skia/source/detail?r=12684

[tfarina, 2013-12-14 01:31:59]

tiny cleanup...pushing to cq!

[commit-bot: I haz the power, 2013-12-14 01:32:12]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[bsalomon, 2013-12-14 14:58:38]

lgtm

[commit-bot: I haz the power, 2013-12-14 14:58:49]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/tfarina@chromium.org/111503008/1

[tfarina, 2013-12-14 15:12:58]

Committed patchset #1 manually as r12684 (presubmit successful).