Metal: Enable EGL_KHR_surfaceless_context.

Surfaceless contexts are emulated in the frontend so this extension can be enabled for the metal backend. It's needed to run Chrome with ANGLE's metal backend. Bug: angleproject:4847 Change-Id: I3a2f74fd5f2ac75a056c528c8b30ffbd41d73e46 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2332880Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>

Metal: Enable EGL_KHR_surfaceless_context.
515b0775 · Jonah Ryan-Davis · Commit Bot · 846cd169 · 515b0775 · 515b0775
Commit 515b0775 authored Jul 31, 2020 by Jonah Ryan-Davis Committed by Commit Bot Aug 03, 2020
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DisplayMtl.mm src/libANGLE/renderer/metal/DisplayMtl.mm +1 -0

EGLSurfacelessContextTest.cpp src/tests/egl_tests/EGLSurfacelessContextTest.cpp +2 -0

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--- a/src/libANGLE/renderer/metal/DisplayMtl.mm
+++ b/src/libANGLE/renderer/metal/DisplayMtl.mm
@@ -256,6 +256,7 @@ void DisplayMtl::generateExtensions(egl::DisplayExtensions *outExtensions) const
 {
    outExtensions->flexibleSurfaceCompatibility = true;
    outExtensions->iosurfaceClientBuffer        = true;
+    outExtensions->surfacelessContext           = true;
 }

 void DisplayMtl::generateCaps(egl::Caps *outCaps) const {}

--- a/src/tests/egl_tests/EGLSurfacelessContextTest.cpp
+++ b/src/tests/egl_tests/EGLSurfacelessContextTest.cpp
@@ -271,5 +271,7 @@ TEST_P(EGLSurfacelessContextTest, Switcheroo)
 ANGLE_INSTANTIATE_TEST(EGLSurfacelessContextTest,
                       WithNoFixture(ES2_D3D9()),
                       WithNoFixture(ES2_D3D11()),
+                       WithNoFixture(ES2_METAL()),
                       WithNoFixture(ES2_OPENGL()),
+                       WithNoFixture(ES2_OPENGLES()),
                       WithNoFixture(ES2_VULKAN()));