command_buffer: Implement EXT_multisample_compatibility

Implement EXT_multisample_compatibility OpenGL ES extension in command
buffer.

Skia needs this in order to enable and disable multisampling when
using GL path rendering.

BUG=506765

Review URL: https://codereview.chromium.org/1231673006

Cr-Commit-Position: refs/heads/master@{#346847}

1 files changed, 21 insertions, 1 deletions

diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_extensions.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_extensions.cc
index 916f2aa..352b76a 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_extensions.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_extensions.cc
@@ -185,6 +185,27 @@ INSTANTIATE_TEST_CASE_P(Service,
                         GLES2DecoderTestWithBlendEquationAdvanced,
                         ::testing::Bool());
 
+class GLES2DecoderTestWithEXTMultisampleCompatibility
+    : public GLES2DecoderTest {
+ public:
+  GLES2DecoderTestWithEXTMultisampleCompatibility() {}
+
+  void SetUp() override {
+    InitState init;
+    init.gl_version = "opengl es 3.1";
+    init.has_alpha = true;
+    init.has_depth = true;
+    init.request_alpha = true;
+    init.request_depth = true;
+    init.bind_generates_resource = true;
+    init.extensions = "GL_EXT_multisample_compatibility ";
+    InitDecoder(init);
+  }
+};
+INSTANTIATE_TEST_CASE_P(Service,
+                        GLES2DecoderTestWithEXTMultisampleCompatibility,
+                        ::testing::Bool());
+
 TEST_P(GLES2DecoderTestWithCHROMIUMPathRendering, GenDeletePaths) {
   static GLuint kFirstClientID = client_path_id_ + 88;
   static GLsizei kPathCount = 58;
@@ -997,4 +1018,3 @@ TEST_P(GLES2DecoderTestWithCHROMIUMPathRendering,
 
 }  // namespace gles2
 }  // namespace gpu
-