Write mojom and StructTraits for display::GammaRampRGBEntry

ui/display/mojo/display_struct_traits_unittest.cc

Index: ui/display/mojo/display_struct_traits_unittest.cc
diff --git a/ui/display/mojo/display_struct_traits_unittest.cc b/ui/display/mojo/display_struct_traits_unittest.cc
index e087e68d63e240e979ba24140c472ba8a62b6b45..e2c3979e367893914af7392798829d9b2c560690 100644
--- a/ui/display/mojo/display_struct_traits_unittest.cc
+++ b/ui/display/mojo/display_struct_traits_unittest.cc
@@ -9,6 +9,7 @@
 #include "ui/display/display_layout.h"
 #include "ui/display/mojo/display_struct_traits_test.mojom.h"
 #include "ui/display/types/display_mode.h"
+#include "ui/display/types/gamma_ramp_rgb_entry.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
@@ -52,6 +53,12 @@ class DisplayStructTraitsTest : public testing::Test,
     callback.Run(std::move(in));
   }
 
+  void EchoGammaRampRGBEntry(
+      const GammaRampRGBEntry& in,
+      const EchoGammaRampRGBEntryCallback& callback) override {
+    callback.Run(in);
+  }
+
   base::MessageLoop loop_;  // A MessageLoop is needed for Mojo IPC to work.
   mojo::BindingSet<mojom::DisplayStructTraitsTest> traits_test_bindings_;
 
@@ -219,4 +226,15 @@ TEST_F(DisplayStructTraitsTest, DisplayLayoutTwoMirrored) {
   CheckDisplayLayoutsEqual(*input, *output);
 }
 
+TEST_F(DisplayStructTraitsTest, BasicGammaRampRGBEntry) {
+  const GammaRampRGBEntry input{259, 81, 16};
+
+  GammaRampRGBEntry output;
+  GetTraitsTestProxy()->EchoGammaRampRGBEntry(input, &output);
+
+  EXPECT_EQ(input.r, output.r);
+  EXPECT_EQ(input.g, output.g);
+  EXPECT_EQ(input.b, output.b);
+}
+
 }  // namespace display