Revert of IPC::ParamTraits for ui::Event (towards ui::Events over moj…

…o IPC) (patchset chromium#18 id:340001 of https://codereview.chromium.org/1695783002/ )

Reason for revert:
Breaks compile: https://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/19183

Original issue's description:
> Implements and tests IPC::ParamTraits for ui::Event (towards ui::Events over mojo IPC). Support for (scoped) pointers for abstract ui::Event objects implemented using ui::ScopedEvent, and trusting ui::EventType information to instantiate the correct concrete type.
>
> BUG=584687
>
> Committed: https://crrev.com/482ddfefe2602f440146eebf4b56e8e040fb81fa
> Cr-Commit-Position: refs/heads/master@{#378821}
>
> Committed: https://crrev.com/74b231ad33ec44bc2662fef2831a3cd90e1f3834
> Cr-Commit-Position: refs/heads/master@{#379094}

TBR=rockot@chromium.org,sadrul@chromium.org,kenrb@chromium.org,tsepez@chromium.org,jam@chromium.org,sky@chromium.org,fsamuel@chromium.org,markdittmer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=584687

Review URL: https://codereview.chromium.org/1765693002

Cr-Commit-Position: refs/heads/master@{#379123}

ash/mus/BUILD.gn

@@ -26,7 +26,7 @@ source_set("lib") {
     "//ash",
     "//cc",
     "//cc/surfaces",
-    "//components/mus/common:mus_common",
+    "//components/mus/common",
     "//components/mus/public/cpp",
     "//components/mus/public/interfaces",
     "//components/user_manager",

components/mus/BUILD.gn

@@ -75,16 +75,14 @@ source_set("lib") {
     "mus_app.h",
   ]
 
-  public_deps = [
-    "//components/mus/common:mus_common",
-  ]
   deps = [
     ":resources_100",
     ":resources_200",
     ":resources_strings",
     "//base",
     "//cc",
     "//cc/surfaces",
+    "//components/mus/common",
     "//components/mus/gles2",
     "//components/mus/public/interfaces",
     "//components/mus/surfaces",
@@ -105,7 +103,9 @@ source_set("lib") {
 
   if (use_x11) {
     public_configs = [ "//build/config/linux:x11" ]
-    public_deps += [ "//ui/events/platform/x11" ]
+    public_deps = [
+      "//ui/events/platform/x11",
+    ]
   }
 
   if (use_ozone) {

components/mus/DEPS

@@ -2,7 +2,7 @@ include_rules = [
   "+cc",
   "+components/resource_provider",
   "+components/gpu",
-  "+ipc",
+  "+mojo/shell",
   "+mojo/common",
   "+mojo/converters",
   "+mojo/public",

components/mus/common/BUILD.gn

@@ -2,49 +2,16 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//testing/test.gni")
-
-component("mus_common") {
+source_set("common") {
   sources = [
     "args.cc",
     "args.h",
-    "event_param_traits.cc",
-    "event_param_traits.h",
-    "event_param_traits_macros.h",
-    "mus_common_export.h",
     "transient_window_utils.h",
     "types.h",
     "util.h",
     "window_tracker.h",
   ]
-
-  defines = [ "MUS_IPC_IMPLEMENTATION" ]
-
   deps = [
     "//components/mus/public/interfaces",
-    "//ipc:ipc",
-    "//mojo/public/c/system:for_component",
-    "//ui/events:events",
-    "//ui/gfx/ipc",
-  ]
-}
-
-test("mus_common_unittests") {
-  sources = [
-    "event_param_traits_unittest.cc",
-  ]
-  public_deps = [
-    ":mus_common",
-  ]
-  deps = [
-    "//base",
-    "//base/test:run_all_unittests",
-    "//base/test:test_config",
-    "//ipc:ipc",
-    "//mojo/edk/test:test_support",
-    "//testing/gtest",
-    "//ui/events:events",
-    "//ui/gfx:test_support",
-    "//ui/gfx/ipc",
   ]
 }

components/mus/common/args.cc

@@ -3,12 +3,11 @@
 // found in the LICENSE file.
 
 #include "components/mus/common/args.h"
-#include "components/mus/common/mus_common_export.h"
 
 namespace mus {
 
 // Initializes X11 in threaded mode, and sets the |override_redirect| flag when
 // creating X11 windows.
-const char MUS_COMMON_EXPORT kUseX11TestConfig[] = "use-x11-test-config";
+const char kUseX11TestConfig[] = "use-x11-test-config";
 
 }  // namespace mus