Skip ReuploadingClearsTexture test on Mac.

BUG=chromium:826576

Change-Id: If241e57480efe3aabfb30a2be453f05d45367e4a
Reviewed-on: https://chromium-review.googlesource.com/982910
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

src/tests/gl_tests/RobustResourceInitTest.cpp

@@ -531,6 +531,9 @@ TEST_P(RobustResourceInitTest, ReuploadingClearsTexture)
 {
     ANGLE_SKIP_TEST_IF(!hasGLExtension());
 
+    // crbug.com/826576
+    ANGLE_SKIP_TEST_IF(IsOSX() && IsNVIDIA() && IsDesktopOpenGL());
+
     // Put some data into the texture
     std::array<GLColor, kWidth * kHeight> data;
     data.fill(GLColor::white);