Suppress two failing NVIDIA D3D11 tests.

src/tests/gl_tests/ComputeShaderTest.cpp

@@ -2911,6 +2911,9 @@ TEST_P(ComputeShaderTest, ImageSizeMipmapSlice)
     // TODO(xinghua.cao@intel.com): http://anglebug.com/3101
     ANGLE_SKIP_TEST_IF(IsIntel() && IsLinux());
 
+    // http://anglebug.com/4392
+    ANGLE_SKIP_TEST_IF(IsWindows() && IsNVIDIA() && IsD3D11());
+
     GLTexture texture[2];
     GLFramebuffer framebuffer;
     const char kCS[] = R"(#version 310 es

src/tests/gl_tests/TextureTest.cpp

@@ -2915,6 +2915,9 @@ TEST_P(TextureSizeTextureArrayTest, BaseLevelVariesInTextureArray)
 {
     ANGLE_SKIP_TEST_IF(IsAMD() && IsD3D11());
 
+    // http://anglebug.com/4391
+    ANGLE_SKIP_TEST_IF(IsNVIDIA() && IsWindows() && IsD3D11());
+
     glActiveTexture(GL_TEXTURE0);
     glBindTexture(GL_TEXTURE_2D, mTexture2DA);
     GLsizei size = 64;