Add a bunch of ES3 enums to the validator.

gpu/command_buffer/client/gles2_implementation_unittest_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
index b16353a30f57fd95732302c0fe196d310bba4a35..138479c476079a20e9d152ff5569489af35cd1a1 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
@@ -919,12 +919,12 @@ TEST_F(GLES2ImplementationTest, GetInternalformativ) {
   Cmds expected;
   ExpectedMemoryInfo result1 =
       GetExpectedResultMemory(sizeof(uint32_t) + sizeof(ResultType));
-  expected.cmd.Init(123, GL_RGBA4, GL_RENDERBUFFER_RED_SIZE, 4, result1.id,
+  expected.cmd.Init(123, GL_RGBA4, GL_NUM_SAMPLE_COUNTS, 4, result1.id,
                     result1.offset);
   EXPECT_CALL(*command_buffer(), OnFlush())
       .WillOnce(SetMemory(result1.ptr, SizedResultHelper<ResultType>(1)))
       .RetiresOnSaturation();
-  gl_->GetInternalformativ(123, GL_RGBA4, GL_RENDERBUFFER_RED_SIZE, 4, &result);
+  gl_->GetInternalformativ(123, GL_RGBA4, GL_NUM_SAMPLE_COUNTS, 4, &result);
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
   EXPECT_EQ(static_cast<ResultType>(1), result);
 }