Use compositor_frame typemap in Blink

ui/events/mojo/BUILD.gn

Index: ui/events/mojo/BUILD.gn
diff --git a/ui/events/mojo/BUILD.gn b/ui/events/mojo/BUILD.gn
index daa7bb9a70231c31d0144124d4edcb14fa9bc11a..5e41756bb30d7e5bdbf928e3e4a45b18a63cf6f4 100644
--- a/ui/events/mojo/BUILD.gn
+++ b/ui/events/mojo/BUILD.gn
@@ -32,3 +32,23 @@ mojom("test_interfaces") {
 
   use_new_wrapper_types = false
 }
+
+group("struct_traits") {
+  public_deps = [
+    ":struct_traits_sources",

[yzshen1, 2016/09/01 00:02:54]

Can we delete this and rename struct_traits_sources to struct_traits? (Same
comment for some other files.)

+  ]
+}
+
+source_set("struct_traits_sources") {
+  sources = [
+    "latency_info_struct_traits.cc",
+    "latency_info_struct_traits.h",
+  ]
+  deps = [
+    ":interfaces_shared_cpp_sources",
+    "//mojo/common",
+    "//mojo/public/cpp/bindings",
+    "//ui/events:events_base",
+    "//ui/gfx/geometry/mojo:struct_traits",
+  ]
+}