Suppress OES_fbo_render_mipmap for win passthrough

Turning fboRenderMipmap on for D3D11 in ANGLE. Will remove when that is rolled in.

TBR=kbr@chromium.org

Bug: 1023747
Change-Id: Ie42feccd285e04bbf7b8177f87802dde64c2bc45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947808Reviewed-by: Shrek Shao <shrekshao@google.com>
Commit-Queue: Shrek Shao <shrekshao@google.com>
Cr-Commit-Position: refs/heads/master@{#720783}

content/test/gpu/gpu_tests/test_expectations/webgl_conformance_expectations.txt

@@ -122,8 +122,8 @@ crbug.com/751849 [ win7 debug nvidia d3d11 passthrough ] conformance/extensions/
 # Win failures     #
 ####################
 
-# Intel Failed issues
-crbug.com/1023747 [ win intel d3d11 passthrough ] WebglExtension_OES_fbo_render_mipmap [ Failure ]
+# Failed issues
+crbug.com/1023747 [ win d3d11 passthrough ] WebglExtension_OES_fbo_render_mipmap [ Failure ]
 
 # Intel flaky issues
 crbug.com/825338 [ win intel d3d11 ] conformance/extensions/oes-texture-float-with-video.html [ RetryOnFailure ]