Update from https://crrev.com/304121

gpu/command_buffer/service/shader_translator_cache_unittest.cc

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <GLES2/gl2.h>
+
+#include "gpu/command_buffer/service/shader_translator_cache.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace gpu {
+namespace gles2 {
+
+TEST(ShaderTranslatorCacheTest, InitParamComparable) {
+  // Tests that ShaderTranslatorInitParams padding or padding of its
+  // members does not affect the object equality or ordering.
+
+  ShBuiltInResources a_resources;
+  memset(&a_resources, 88, sizeof(a_resources));
+  ShInitBuiltInResources(&a_resources);
+
+  ShBuiltInResources b_resources;
+  memset(&b_resources, 77, sizeof(b_resources));
+  ShInitBuiltInResources(&b_resources);
+
+  EXPECT_TRUE(memcmp(&a_resources, &b_resources, sizeof(a_resources)) == 0);
+
+  ShCompileOptions driver_bug_workarounds = SH_VALIDATE;
+
+  char a_storage[sizeof(ShaderTranslatorCache::ShaderTranslatorInitParams)];
+  memset(a_storage, 55, sizeof(a_storage));
+  ShaderTranslatorCache::ShaderTranslatorInitParams* a =
+      new (&a_storage) ShaderTranslatorCache::ShaderTranslatorInitParams(
+          GL_VERTEX_SHADER,
+          SH_GLES2_SPEC,
+          a_resources,
+          ShaderTranslatorInterface::kGlslES,
+          driver_bug_workarounds);
+
+  ShaderTranslatorCache::ShaderTranslatorInitParams b(
+      GL_VERTEX_SHADER,
+      SH_GLES2_SPEC,
+      b_resources,
+      ShaderTranslatorInterface::kGlslES,
+      driver_bug_workarounds);
+
+  EXPECT_TRUE(*a == b);
+  EXPECT_FALSE(*a < b || b < *a);
+
+  memset(a_storage, 55, sizeof(a_storage));
+  a = new (&a_storage) ShaderTranslatorCache::ShaderTranslatorInitParams(b);
+
+  EXPECT_TRUE(*a == b);
+  EXPECT_FALSE(*a < b || b < *a);
+}
+}  // namespace gles2
+}  // namespace gpu