command_buffer: Implement CHROMIUM_framebuffer_mixed_samples extension

gpu/command_buffer/client/gles2_cmd_helper_autogen.h

Index: gpu/command_buffer/client/gles2_cmd_helper_autogen.h
diff --git a/gpu/command_buffer/client/gles2_cmd_helper_autogen.h b/gpu/command_buffer/client/gles2_cmd_helper_autogen.h
index 605db93b4e2fff311a1dc9b23f7a95a7e9257bfb..3d7daa58776798cfb136ed8507960aee23da143e 100644
--- a/gpu/command_buffer/client/gles2_cmd_helper_autogen.h
+++ b/gpu/command_buffer/client/gles2_cmd_helper_autogen.h
@@ -3160,6 +3160,14 @@ void ProgramPathFragmentInputGenCHROMIUM(GLuint program,
   }
 }
 
+void CoverageModulationCHROMIUM(GLenum components) {
+  gles2::cmds::CoverageModulationCHROMIUM* c =
+      GetCmdSpace<gles2::cmds::CoverageModulationCHROMIUM>();
+  if (c) {
+    c->Init(components);
+  }
+}
+
 void BlendBarrierKHR() {
   gles2::cmds::BlendBarrierKHR* c = GetCmdSpace<gles2::cmds::BlendBarrierKHR>();
   if (c) {