command_buffer: Implement CHROMIUM_framebuffer_mixed_samples extension

gpu/command_buffer/client/gles2_c_lib_autogen.h

Index: gpu/command_buffer/client/gles2_c_lib_autogen.h
diff --git a/gpu/command_buffer/client/gles2_c_lib_autogen.h b/gpu/command_buffer/client/gles2_c_lib_autogen.h
index 35f57ec666c2de42a333c1fd88e659a9de1ac16d..c866225a13486f1b63fa2773c2eb2ce0032e1f98 100644
--- a/gpu/command_buffer/client/gles2_c_lib_autogen.h
+++ b/gpu/command_buffer/client/gles2_c_lib_autogen.h
@@ -1704,6 +1704,9 @@ GLES2ProgramPathFragmentInputGenCHROMIUM(GLuint program,
   gles2::GetGLContext()->ProgramPathFragmentInputGenCHROMIUM(
       program, location, genMode, components, coeffs);
 }
+void GL_APIENTRY GLES2CoverageModulationCHROMIUM(GLenum components) {
+  gles2::GetGLContext()->CoverageModulationCHROMIUM(components);
+}
 GLenum GL_APIENTRY GLES2GetGraphicsResetStatusKHR() {
   return gles2::GetGLContext()->GetGraphicsResetStatusKHR();
 }
@@ -3009,6 +3012,10 @@ extern const NameToFunc g_gles2_function_table[] = {
             glProgramPathFragmentInputGenCHROMIUM),
     },
     {
+        "glCoverageModulationCHROMIUM",
+        reinterpret_cast<GLES2FunctionPointer>(glCoverageModulationCHROMIUM),
+    },
+    {
         "glGetGraphicsResetStatusKHR",
         reinterpret_cast<GLES2FunctionPointer>(glGetGraphicsResetStatusKHR),
     },