Create mojom and StructTraits for ui/display/types/display_mode.cc

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 a223bddff8299a14769eaac94a5864372ec943d5..1797e6e847d3c198676cc3af087ba8d381ec3862 100644
--- a/ui/display/mojo/display_struct_traits_unittest.cc
+++ b/ui/display/mojo/display_struct_traits_unittest.cc
@@ -7,6 +7,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/display/display.h"
 #include "ui/display/mojo/display_struct_traits_test.mojom.h"
+#include "ui/display/types/display_mode.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
@@ -31,6 +32,11 @@ class DisplayStructTraitsTest : public testing::Test,
     callback.Run(in);
   }
 
+  void EchoDisplayMode(const DisplayMode& in,
+                       const EchoDisplayModeCallback& callback) override {
+    callback.Run(in);
+  }
+
   base::MessageLoop loop_;  // A MessageLoop is needed for Mojo IPC to work.
   mojo::BindingSet<mojom::DisplayStructTraitsTest> traits_test_bindings_;
 
@@ -79,4 +85,20 @@ TEST_F(DisplayStructTraitsTest, SetAllDisplayValues) {
   CheckDisplaysEqual(input, output);
 }
 
+TEST_F(DisplayStructTraitsTest, DefaultDisplayMode) {
+  // Prepare sample input with random values
+  const DisplayMode input(gfx::Size(15, 29), true, 61.0);
+
+  mojom::DisplayStructTraitsTestPtr proxy = GetTraitsTestProxy();
+  DisplayMode output;
+
+  EXPECT_TRUE(proxy->EchoDisplayMode(input, &output));
+
+  // We want to test each component individually to make sure each data member
+  // was correctly serialized and deserialized.
+  EXPECT_EQ(input.size(), output.size());
+  EXPECT_EQ(input.is_interlaced(), output.is_interlaced());
+  EXPECT_EQ(input.refresh_rate(), output.refresh_rate());
+}
+
 }  // namespace display