Update from https://crrev.com/317530

cc/resources/platform_color_unittest.cc

+// Copyright 2015 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 "cc/resources/platform_color.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+namespace {
+
+// Verify SameComponentOrder on this platform.
+TEST(PlatformColorTest, SameComponentOrder) {
+  bool rgba = !!SK_B32_SHIFT;
+
+  for (size_t i = 0; i <= RESOURCE_FORMAT_MAX; ++i) {
+    ResourceFormat format = static_cast<ResourceFormat>(i);
+    switch (format) {
+      case RGBA_8888:
+        EXPECT_EQ(rgba, PlatformColor::SameComponentOrder(format));
+        break;
+      case RGBA_4444:
+        // RGBA_4444 indicates the number of bytes per pixel but the format
+        // doesn't actually imply RGBA ordering. It uses the native ordering.
+        EXPECT_EQ(true, PlatformColor::SameComponentOrder(format));
+        break;
+      case BGRA_8888:
+        EXPECT_NE(rgba, PlatformColor::SameComponentOrder(format));
+        break;
+      case ALPHA_8:
+      case LUMINANCE_8:
+      case RGB_565:
+      case ETC1:
+      case RED_8:
+        EXPECT_FALSE(PlatformColor::SameComponentOrder(format));
+        break;
+    }
+  }
+}
+
+}  // namespace
+}  // namespace cc