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

Review URL: https://codereview.chromium.org/111503008

git-svn-id: http://skia.googlecode.com/svn/trunk@12684 2bbb7eff-a529-9590-31e7-b0007b416f81

tests/FlatDataTest.cpp

@@ -84,4 +84,3 @@ DEF_TEST(FlatData, reporter) {
     SkAutoUnref aurxf(xfer);
     testCreate(reporter, xfer, &flattenFlattenableProc);
 }
-

tests/ImageCacheTest.cpp

@@ -28,7 +28,7 @@ static void test_cache(skiatest::Reporter* reporter, SkScaledImageCache& cache,
     for (int i = 0; i < COUNT; ++i) {
         make_bm(&bm[i], DIM, DIM);
     }
-    
+
     for (int i = 0; i < COUNT; ++i) {
         SkBitmap tmp;