ash: Add missing dependency on events_ozone

This is needed by display_controller.cc in ozone builds (to set display
rotation & scale to apply to cursor movement).

These dependencies are needed to enable strict checking of undefined
symbols in the shared_library build.

BUG=445627
TEST=build chrome for link_freon via simplechrome

Review URL: https://codereview.chromium.org/898543006

Cr-Commit-Position: refs/heads/master@{#314429}

ash/BUILD.gn

@@ -84,7 +84,10 @@ component("ash") {
   }
 
   if (use_ozone) {
-    deps += [ "//ui/ozone" ]
+    deps += [
+      "//ui/events/ozone:events_ozone",
+      "//ui/ozone",
+    ]
   }
 
   if (is_chromeos) {

ash/ash.gyp

@@ -934,6 +934,7 @@
         }],
         ['use_ozone==1', {
           'dependencies': [
+            '../ui/events/ozone/events_ozone.gyp:events_ozone',
             '../ui/ozone/ozone.gyp:ozone',
           ],
         }],