Add UNPACK_ROW_LENGTH support to D3D11 renderer

Change-Id: I31ccffddcb04a45f19d3c3eb9a396c30e794b218
Reviewed-on: https://chromium-review.googlesource.com/243951
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Minmin Gong <mgong@microsoft.com>
diff --git a/src/libANGLE/renderer/d3d/FramebufferD3D.cpp b/src/libANGLE/renderer/d3d/FramebufferD3D.cpp
index 263f980..44e7851 100644
--- a/src/libANGLE/renderer/d3d/FramebufferD3D.cpp
+++ b/src/libANGLE/renderer/d3d/FramebufferD3D.cpp
@@ -257,7 +257,7 @@
 {
     GLenum sizedInternalFormat = gl::GetSizedInternalFormat(format, type);
     const gl::InternalFormat &sizedFormatInfo = gl::GetInternalFormatInfo(sizedInternalFormat);
-    GLuint outputPitch = sizedFormatInfo.computeRowPitch(type, area.width, state.getPackAlignment());
+    GLuint outputPitch = sizedFormatInfo.computeRowPitch(type, area.width, state.getPackAlignment(), 0);
 
     return readPixels(area, format, type, outputPitch, state.getPackState(), reinterpret_cast<uint8_t*>(pixels));
 }