Texture compression unit tests along with a couple of bug fixes

R=robertphillips@google.com

Author: krajcevski@google.com

Review URL: https://codereview.chromium.org/330453005
diff --git a/gyp/tests.gypi b/gyp/tests.gypi
index 6af8e91..d06d0d7 100644
--- a/gyp/tests.gypi
+++ b/gyp/tests.gypi
@@ -174,6 +174,7 @@
     '../tests/TLSTest.cpp',
     '../tests/TSetTest.cpp',
     '../tests/TestSize.cpp',
+    '../tests/TextureCompressionTest.cpp',
     '../tests/TileGridTest.cpp',
     '../tests/ToUnicodeTest.cpp',
     '../tests/TracingTest.cpp',