Disable TestVp8Impl.BaseUnitTest on MSan.

MemorySanitizer uses generic (non-optimized) libvpx which is not bit
exact. This may be a bug in upstream libvpx, but we're forced to disable
it now as it blocks launching the MSan bot.

R=stefan@webrtc.org
TBR=marpan@webrtc.org
BUG=3904

Review URL: https://webrtc-codereview.appspot.com/24089004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7491 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
index 3cc8bc3..5e0bfc8 100644
--- a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
@@ -192,7 +192,13 @@
   VideoCodec codec_inst_;
 };
 
+// Disabled on MemorySanitizer as it's breaking on generic libvpx.
+// https://code.google.com/p/webrtc/issues/detail?id=3904
+#if defined(MEMORY_SANITIZER)
+TEST_F(TestVp8Impl, DISABLED_BaseUnitTest) {
+#else
 TEST_F(TestVp8Impl, DISABLED_ON_ANDROID(BaseUnitTest)) {
+#endif
   // TODO(mikhal): Remove dependency. Move all test code here.
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, encoder_->Release());
   UnitTest unittest;