Small fix for potentially unused variables in yuv_convert_unittest.cc

media/base/yuv_convert_unittest.cc

Index: media/base/yuv_convert_unittest.cc
diff --git a/media/base/yuv_convert_unittest.cc b/media/base/yuv_convert_unittest.cc
index 77c48ce0b9cec71d7675a6fbb2a2cecd5e03ad6c..9c5eac0b2931d8f7ca61fc480d271a2271cfa6a0 100644
--- a/media/base/yuv_convert_unittest.cc
+++ b/media/base/yuv_convert_unittest.cc
@@ -39,7 +39,8 @@ static const int kRGBSizeScaled = kScaledWidth * kScaledHeight * kBpp;
 static const int kRGB24Size = kSourceYSize * 3;
 static const int kRGBSizeConverted = kSourceYSize * kBpp;
 
-#if !defined(ARCH_CPU_ARM_FAMILY) && !defined(ARCH_CPU_MIPS_FAMILY)
+#if !defined(ARCH_CPU_ARM_FAMILY) && !defined(ARCH_CPU_MIPS_FAMILY) && \
+    !defined(OS_ANDROID)
 static const int kSourceAOffset = kSourceYSize * 12 / 8;
 static const int kYUVA12Size = kSourceYSize * 20 / 8;
 #endif