Write mojom and StructTraits for DisplaySnapshot.

ui/display/types/display_mode.cc

Index: ui/display/types/display_mode.cc
diff --git a/ui/display/types/display_mode.cc b/ui/display/types/display_mode.cc
index 6d43caa5638406c5e43a4b7003d0e491db066715..e452d5a9d09746091da318a4fae9ab8bebb73856 100644
--- a/ui/display/types/display_mode.cc
+++ b/ui/display/types/display_mode.cc
@@ -24,6 +24,12 @@ std::unique_ptr<DisplayMode> DisplayMode::Clone() const {
                                           refresh_rate_));
 }
 
+bool DisplayMode::operator==(const DisplayMode& display_mode) const {
+  return (this->size() == display_mode.size()) &&

[kylechar, 2017/02/13 22:01:24]

You don't need () around each == statement.

[thanhph1, 2017/02/14 20:20:54]

Done.

+         (this->is_interlaced() == display_mode.is_interlaced()) &&
+         (this->refresh_rate() == display_mode.refresh_rate());
+}
+
 std::string DisplayMode::ToString() const {
   return base::StringPrintf("[%dx%d %srate=%f]",
                             size_.width(),