UserInputMonitorLinux: don't set for ozone

Atm, this class is X11 only. We need to make that work with
Ozone/X11/Wayland in the future.

Bug: 1085700
Change-Id: I69d7d7128c3fb4b18cbfd8890dc4a1c8e85b1ddd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2352928
Commit-Queue: Maksim Sisov (GMT+3) <msisov@igalia.com>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798617}

media/DEPS

@@ -20,6 +20,7 @@ include_rules = [
   "+third_party/libyuv",
   "+third_party/opus",
   "+third_party/skia",
+  "+ui/base/ui_base_features.h",
   "+ui/display",
   "+ui/events",
   "+ui/gfx",

media/base/BUILD.gn

@@ -383,6 +383,7 @@ source_set("base") {
   if (use_x11) {
     sources += [ "user_input_monitor_linux.cc" ]
     deps += [
+      "//ui/base:features",
       "//ui/events:events_base",
       "//ui/events/devices/x11",
       "//ui/gfx/x",

media/base/user_input_monitor_linux.cc

@@ -21,6 +21,7 @@
 #include "base/task/current_thread.h"
 #include "media/base/keyboard_event_counter.h"
 #include "third_party/skia/include/core/SkPoint.h"
+#include "ui/base/ui_base_features.h"
 #include "ui/events/devices/x11/xinput_util.h"
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
 #include "ui/gfx/x/x11.h"
@@ -139,6 +140,14 @@ uint32_t UserInputMonitorLinuxCore::GetKeyPressCount() const {
 void UserInputMonitorLinuxCore::StartMonitor() {
   DCHECK(io_task_runner_->BelongsToCurrentThread());
 
+  // TODO(https://crbug.com/1116414): support UserInputMonitorLinux on
+  // Ozone/Linux.
+  if (features::IsUsingOzonePlatform()) {
+    NOTIMPLEMENTED_LOG_ONCE();
+    StopMonitor();
+    return;
+  }
+
   if (!connection_) {
     // TODO(jamiewalch): We should pass the connection in.
     if (auto* connection = x11::Connection::Get()) {